APA aipamena

Knight, S., & Morris, P. (2008). Azathioprine and Steroids. Elsevier.

Chicago Style aipamena

Knight, SR, and P. Morris. Azathioprine and Steroids. Elsevier, 2008.

MLA aipamena

Knight, SR, and P. Morris. Azathioprine and Steroids. Elsevier, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.