APA (7th ed.) Citation

Haas, K., & Haas, A. (1987). Understanding sexuality.

Chicago Style (17th ed.) Citation

Haas, Kurt, and Adelaide Haas. Understanding Sexuality. St. Louis, USA, 1987.

MLA (9th ed.) Citation

Haas, Kurt, and Adelaide Haas. Understanding Sexuality. 1987.

Warning: These citations may not always be 100% accurate.