Cita APA

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

Chicago Style (17th ed.) Citation

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

Cita MLA

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