Cita APA (7th ed.)
Federal Writers' Project & ebrary, Inc. (2007). The WPA guide to 1930s Iowa. University of Iowa Press.
Cita Chicago (17th ed.)
Federal Writers' Project i Inc ebrary. The WPA Guide to 1930s Iowa. Iowa City: University of Iowa Press, 2007.
Cita MLA (9th ed.)
Federal Writers' Project i Inc ebrary. The WPA Guide to 1930s Iowa. University of Iowa Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.