APA (7th ed.) Citation

Allen, O. E. (1982). Secrets of a good digestion. Library of Health.

Chicago Style (17th ed.) Citation

Allen, Oliver E. Secrets of a Good Digestion. Alexandria, Va: Library of Health, 1982.

MLA (9th ed.) Citation

Allen, Oliver E. Secrets of a Good Digestion. Library of Health, 1982.