APA (7. basım) Alıntı

Westfall, P. P. (1949). On the leech and its use in medicine. s.n..

Chicago Style (17. basım) Atıf

Westfall, Paul Peter. On the Leech and Its Use in Medicine. [S.l.: s.n., 1949.

MLA (8th ed.) Atıf

Westfall, Paul Peter. On the Leech and Its Use in Medicine. s.n., 1949.