Engel, J. W. (1990). Study guide with readings to accompany Hyde, Understanding human sexuality (4th ed.). McGraw-Hill.
Cita Chicago Style (17a ed.)Engel, John W. Study Guide with Readings to Accompany Hyde, Understanding Human Sexuality. 4th ed. New York [etc.]: McGraw-Hill, 1990.
Cita MLA (9a ed.)Engel, John W. Study Guide with Readings to Accompany Hyde, Understanding Human Sexuality. 4th ed. McGraw-Hill, 1990.
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