APA (7th ed.) Citation

Block, W. A. (1972). What your child really wants to know about sex, and why. Prentice-Hall.

Chicago Style (17th ed.) Citation

Block, William A. What Your Child Really Wants to Know About Sex, and Why. Englewood Cliffs, N.J.: Prentice-Hall, 1972.

MLA (9th ed.) Citation

Block, William A. What Your Child Really Wants to Know About Sex, and Why. Prentice-Hall, 1972.