APA aipamena

Potter, R. G. (1977). Points from Letters: Haematemesis and melaena.

Chicago Style aipamena

Potter, R G. Points From Letters: Haematemesis and Melaena. 1977.

MLA aipamena

Potter, R G. Points From Letters: Haematemesis and Melaena. 1977.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.