APA (7th ed.) Citation

Billings, J. J., & Brown, J. B. (1983). The ovulation method: The achievement or avoidance of pregnancy by a technique which is reliable and universally acceptable (7th ed.). Advocate Press.

Chicago Style (17th ed.) Citation

Billings, John J., and J. B. Brown. The Ovulation Method: The Achievement or Avoidance of Pregnancy by a Technique Which Is Reliable and Universally Acceptable. 7th ed. Melbourne: Advocate Press, 1983.

MLA (8th ed.) Citation

Billings, John J., and J. B. Brown. The Ovulation Method: The Achievement or Avoidance of Pregnancy by a Technique Which Is Reliable and Universally Acceptable. 7th ed. Advocate Press, 1983.