APA (7th ed.) Citation

Southard, H. (1971). Sex before twenty: New answers for young people (Rev. ed.). Dutton.

Chicago Style (17th ed.) Citation

Southard, Helen. Sex Before Twenty: New Answers for Young People. Rev. ed. New York: Dutton, 1971.

MLA (8th ed.) Citation

Southard, Helen. Sex Before Twenty: New Answers for Young People. Rev. ed. Dutton, 1971.