Cita APA (7th ed.)

Wyllie, R., Hyams, J. S., & Kay, M. (2011). Pediatric gastrointestinal and liver disease (4th ed.). Elsevier Saunders.

Cita Chicago (17th ed.)

Wyllie, R., Jeffrey S. Hyams, i Marsha Kay. Pediatric Gastrointestinal and Liver Disease. 4th ed. Philadelphia: Elsevier Saunders, 2011.

Cita MLA (9th ed.)

Wyllie, R., et al. Pediatric Gastrointestinal and Liver Disease. 4th ed. Elsevier Saunders, 2011.