APA (7th ed.) Citation

Wigal, D. (2014). Opium: The flowers of evil. Parkstone International.

Chicago Style (17th ed.) Citation

Wigal, Donald. Opium: The Flowers of Evil. New York: Parkstone International, 2014.

MLA (9th ed.) Citation

Wigal, Donald. Opium: The Flowers of Evil. Parkstone International, 2014.

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