APA

Perrin M., Smith T. E., . (1972). Ideas and learning activities for family life and sex education. Dubuque, Iowa: W. C. Brown Co.

Chicago

Perrin Mark, Smith Thomas E, . 1972. Ideas and learning activities for family life and sex education. Dubuque, Iowa: W. C. Brown Co.

Harvard

Perrin M., Smith T. E., . (1972). Ideas and learning activities for family life and sex education. Dubuque, Iowa: W. C. Brown Co.

MLA

Perrin Mark, Smith Thomas E, . Ideas and learning activities for family life and sex education. Dubuque, Iowa: W. C. Brown Co. 1972.