APA aipamena

McDONNELL, P. (1999). Refractive surgery.

Chicago Style aipamena

McDONNELL, P. Refractive Surgery. 1999.

MLA aipamena

McDONNELL, P. Refractive Surgery. 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.