APA (7th ed.) Citation

Darrah, W. C. (1939). Principles of paleobotany. Chronica botanica company.

Chicago Style (17th ed.) Citation

Darrah, William C. Principles of Paleobotany. Leiden, Holland: Chronica botanica company, 1939.

MLA (9th ed.) Citation

Darrah, William C. Principles of Paleobotany. Chronica botanica company, 1939.