APA (7th ed.) Citation

Youngken, H. W. (1943). Text-book of pharmacognosy (Fifth edition.). Blakiston.

Chicago Style (17th ed.) Citation

Youngken, Heber Wilkinson. Text-book of Pharmacognosy. Fifth edition. Philadelphia: Blakiston, 1943.

MLA (9th ed.) Citation

Youngken, Heber Wilkinson. Text-book of Pharmacognosy. Fifth edition. Blakiston, 1943.

Warning: These citations may not always be 100% accurate.