APA (7e ed.) Bronvermelding

Unger, I., & Unger, D. (1978). These United States: The questions of our past. Little, Brown.

Chicago (17e ed.) Bronvermelding

Unger, Irwin, en Debi Unger. These United States: The Questions of Our Past. Boston: Little, Brown, 1978.

MLA (8e ed.) Bronvermelding

Unger, Irwin, en Debi Unger. These United States: The Questions of Our Past. Little, Brown, 1978.