APA (7th ed.) Citation

Maxon, W. R. (1912). Studies of tropical American ferns. Government Print.

Chicago Style (17th ed.) Citation

Maxon, William R. Studies of Tropical American Ferns. Washington: Government Print, 1912.

MLA (9th ed.) Citation

Maxon, William R. Studies of Tropical American Ferns. Government Print, 1912.

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