APA (7th ed.) Citation

Davis, R. O. E. (1912). Sponge spicules in swamp soils. [Govt. Print. Off].

Chicago Style (17th ed.) Citation

Davis, Royall O. E. Sponge Spicules in Swamp Soils. [Washington]: [Govt. Print. Off], 1912.

MLA (9th ed.) Citation

Davis, Royall O. E. Sponge Spicules in Swamp Soils. [Govt. Print. Off], 1912.