Southard, H. (1971). Sex before twenty: New answers for young people (Rev. ed.). Dutton.
Chicagoスタイル(17版)引用形式Southard, Helen. Sex Before Twenty: New Answers for Young People. Rev. ed. New York: Dutton, 1971.
MLA(8版)引用形式Southard, Helen. Sex Before Twenty: New Answers for Young People. Rev. ed. Dutton, 1971.
警告: この引用は必ずしも正確ではありません.