APA aipamena

(1990). Diseases of the digestive system <i>es</i>.

Chicago Style aipamena

Diseases of the Digestive System <i>es</i>. 1990.

MLA aipamena

Diseases of the Digestive System <i>es</i>. 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.