Cita APA (7th ed.)

Spiro, H. M. (1970). Clinical gastroenterology. Macmillan Company.

Cita Chicago (17th ed.)

Spiro, Howard M. Clinical Gastroenterology. Estados Unidos: Macmillan Company, 1970.

Cita MLA (9th ed.)

Spiro, Howard M. Clinical Gastroenterology. Macmillan Company, 1970.