APA aipamena

Greenfield, L. (1949). POINTS FROM LETTERS: Procaine Penicillin.

Chicago Style aipamena

Greenfield, L. POINTS FROM LETTERS: Procaine Penicillin. 1949.

MLA aipamena

Greenfield, L. POINTS FROM LETTERS: Procaine Penicillin. 1949.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.