Zotero is an application that collects, manages, and cites research sources. The application for Windows, Max and Linux is available for download at zotero.org  You can also download the Zotero Connector which allows you to save information/content from many library databases and the web directly to your Zotero library.

Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies. It also includes a cite while you write plug-in for Word and the Zotero Connector can be used with Google Docs.

Sample Journal Citations:
N: 1. Frank P. Whitney, "The Six-Year High School in Cleveland," School Review 37, no.4 (April 1929): 268, http://www.jstor.org/stable/1078814.

B: Whitney, Frank P. "The Six-Year High School in Cleveland." School Review 37, no. 4 (April 1929): 267-271. http://www.jstor.org/stable/1078814.

Sample Book Citation:
N: 1. Atul Gawande, Being Mortal: Medicine and What Matters in the End (London: Profile Books, 2014), 79-80.

B: Gawande, Atul. Being Mortal: Medicine and What Matters in the End. London: Profile Books, 2014.

Sample eBook Citation:
N: 1. Atul Gawande, Being Mortal: Medicine and What Matters in the End (New York: Metropolitan, 2014), chap. 3, https://archive.org/details/beingmortalmedic0000gawa.

B: Gawande, Atul. Being Mortal: Medicine and What Matters in the End. New York: Metropolitan, 2014. https://archive.org/details/beingmortalmedic0000gawa

Sample Newspaper Article (with author)
N: 23. Neil Irwin, "Low Rates May Stay for Years After the Fed Reverses Course," New York Times, December 15, 2015, sec. A

B: Irwin, Neil. "Low Rates May Stay for Years After the Fed Reverses Course." New York Times, December 15, 2015, sec. A.

Sample Newspaper Citation (from a database)
N: 23. "Safe in Sioux City at Last: Union Pacific Succeeds in Securing Trackage from the St. Paul Road, Omaha Daily Herald, May 16, 1889, America's Historical Newspapers.

B: "Safe in Sioux City at Last: Union Pacific Succeeds in Securing Trackage from the St. Paul Road." Omaha Daily Herald, May 16, 1889. America's Historical Newspapers.
 

Unsigned Newspaper Article
N: 24. "Next President Better Be a Climate Change Believer," Chicago Sun-Times, June 24, 2016, https://chicago.suntimes.com/opinion/editorial-next-president-better-be-a-climate-change-believer/.

B. Chicago Sun-Times. "Next President Better Be a Climate Change Believer." June 24, 2016. https://chicago.suntimes.com/opinion/editorial-next-president-better-be-a-climate-change-believer/.

Shortened form (for subsequent references to the same resource in your footnotes):
1. Samuel A. Morley, Poverty and Inequality in Latin America: The Impact of Adjustment and Recovery (Baltimore: John Hopkins University Press, 1995), 24-25.
2. Regina M. Schwartz, "Nationals and Nationalism: Adultery in the House of David," Critical Inquiry 19, no. 1 (1992): 131-32.
3. Ernest Kaiser, "The Literature of Harlem," In Harlem: A Community in Transition, ed. J.H. Clarke (New York: Citadel Press, 1964). 
4. Morley, Poverty and Inequality, 43
5. Schwartz, "Nationals and Nationalism," 138.
6. Kaiser, "Literature of Harlem," 189-90.