APA (7th ed.) Citation
Unger, I., & Unger, D. (1995). These United States: The questions of our past (6th, combined ed.). Prentice Hall.
Chicago Style (17th ed.) Citation
Unger, Irwin, and Debi Unger. These United States: The Questions of Our Past. 6th, combined ed. Englewood Cliffs, N.J.: Prentice Hall, 1995.
MLA (9th ed.) Citation
Unger, Irwin, and Debi Unger. These United States: The Questions of Our Past. 6th, combined ed. Prentice Hall, 1995.
Warning: These citations may not always be 100% accurate.