Cita APA (7th ed.)
Pengelley,Eric T. (1974). Sex and human life. Addison-Wesley.
Cita Chicago (17th ed.)
Pengelley,Eric T. Sex and Human Life. Massachusetts: Addison-Wesley, 1974.
Cita MLA (9th ed.)
Pengelley,Eric T. Sex and Human Life. Addison-Wesley, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.