Gaya APA

Youngken, H, W. (1921). Pharmaceutical Botany 3rd Ed., Rev., and Enlarge : A Text-book for Students of Pharmacy and Science (3rd Ed., Rev., and Enlarge). Philadelphia: P. Blakistons Son & Co..

Gaya MLA

Youngken, Heber., W.. "Pharmaceutical Botany 3rd Ed., Rev., and Enlarge : A Text-book for Students of Pharmacy and Science". 3rd Ed., Rev., and Enlarge Philadelphia: P. Blakistons Son & Co., 1921. Text.