APA

Pieper J., Pieper J., . (1954). Fortitude and temperance. New York: Pantheon Books.

Chicago

Pieper Josef, Pieper Josef, . 1954. Fortitude and temperance. New York: Pantheon Books.

Harvard

Pieper J., Pieper J., . (1954). Fortitude and temperance. New York: Pantheon Books.

MLA

Pieper Josef, Pieper Josef, . Fortitude and temperance. New York: Pantheon Books. 1954.