Preshaw, R. M. (1972). Vitamin C and the common cold.
Chicago Style aipamenaPreshaw, R. M. Vitamin C and the Common Cold. 1972.
MLA aipamenaPreshaw, R. M. Vitamin C and the Common Cold. 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena