Cita APA (7a ed.)

Youngken, H. W. (1951). Pharmaceutical botany (7th. ed.). Blakiston.

Cita Chicago Style (17a ed.)

Youngken, Heber W. Pharmaceutical Botany. 7th. ed. Philadelphia: Blakiston, 1951.

Cita MLA (8a ed.)

Youngken, Heber W. Pharmaceutical Botany. 7th. ed. Blakiston, 1951.