APA aipamena

Petsko, G. A. (2001). Winter, plague and pestilence. BioMed Central.

Chicago Style aipamena

Petsko, Gregory A. Winter, Plague and Pestilence. BioMed Central, 2001.

MLA aipamena

Petsko, Gregory A. Winter, Plague and Pestilence. BioMed Central, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.