APA (7th ed.) Citation

Booth, M., & Elfer, J. (2019). Opium: A history (Unabridged.). Tantor Media.

Chicago Style (17th ed.) Citation

Booth, Martin, and Julian Elfer. Opium: A History. Unabridged. Old Saybrook: Tantor Media, 2019.

MLA (8th ed.) Citation

Booth, Martin, and Julian Elfer. Opium: A History. Unabridged. Tantor Media, 2019.

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