APA

Libby W., . (1929). Introduction to contemporary civilization: an orientation course for college students. New York: Alfred A. Knopf.

Chicago

Libby Walter, . 1929. Introduction to contemporary civilization: an orientation course for college students. New York: Alfred A. Knopf.

Harvard

Libby W., . (1929). Introduction to contemporary civilization: an orientation course for college students. New York: Alfred A. Knopf.

MLA

Libby Walter, . Introduction to contemporary civilization: an orientation course for college students. New York: Alfred A. Knopf. 1929.