APA

Karlen A., . (1971). Sexuality and homosexuality. New York: W.W. Norton & Company.

Chicago

Karlen Arno, . 1971. Sexuality and homosexuality. New York: W.W. Norton & Company.

Harvard

Karlen A., . (1971). Sexuality and homosexuality. New York: W.W. Norton & Company.

MLA

Karlen Arno, . Sexuality and homosexuality. New York: W.W. Norton & Company. 1971.