Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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