APA (7th ed.) Citation

Gager, C. S. (1931). The plant world: Plant life of our earth. The University society, incorporated.

Chicago Style (17th ed.) Citation

Gager, C. Stuart. The Plant World: Plant Life of Our Earth. New York: The University society, incorporated, 1931.

MLA (9th ed.) Citation

Gager, C. Stuart. The Plant World: Plant Life of Our Earth. The University society, incorporated, 1931.