APA (7e ed.) Bronvermelding
Heffner, R. D. (1954). A documentary History of the United States. The new American library.
Chicago (17e ed.) Bronvermelding
Heffner, Richard D. A Documentary History of the United States. New York: The new American library, 1954.
MLA (9e ed.) Bronvermelding
Heffner, Richard D. A Documentary History of the United States. The new American library, 1954.
Let op: Deze citaties zijn niet altijd 100% accuraat.