Cita APA (7th ed.)

Laufer, I., & Levine, M. S. (1992). Double contrast gastrointestinal radiology. Saunders Company.

Cita Chicago (17th ed.)

Laufer, Igor, i Marc S. Levine. Double Contrast Gastrointestinal Radiology. Philadelphia: Saunders Company, 1992.

Cita MLA (9th ed.)

Laufer, Igor, i Marc S. Levine. Double Contrast Gastrointestinal Radiology. Saunders Company, 1992.