APA (7th ed.) Citation

Spoehr, H. A. (1919). The carbohydrate economy of cacti.

Chicago Style (17th ed.) Citation

Spoehr, Herman Augustus. The Carbohydrate Economy of Cacti. Washington, 1919.

MLA (9th ed.) Citation

Spoehr, Herman Augustus. The Carbohydrate Economy of Cacti. 1919.

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