APA-viite (7. p.)
Unger, I., & Unger, D. (1995). These United States: The questions of our past (6th, combined ed.). Prentice Hall.
Chicago-viite (17. p.)
Unger, Irwin, ja Debi Unger. These United States: The Questions of Our Past. 6th, combined ed. Englewood Cliffs, N.J.: Prentice Hall, 1995.
MLA-viite (9. p.)
Unger, Irwin, ja Debi Unger. These United States: The Questions of Our Past. 6th, combined ed. Prentice Hall, 1995.
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