APA citiranje

Unger, I. (1986). These United States: The questions of our past. New York: Prentice-Hall.

Trích dẫn kiểu Chicago

Unger, Irwin. These United States: The Questions of Our Past. New York: Prentice-Hall, 1986.

MLA citiranje

Unger, Irwin. These United States: The Questions of Our Past. New York: Prentice-Hall, 1986.