APA (7th ed.) Citation

Collings, G. H. (1941). Commercial fertilizers, their sources & use (3d edition.). Blakiston Company.

Chicago Style (17th ed.) Citation

Collings, Gilbeart H. Commercial Fertilizers, Their Sources & Use. 3d edition. Philadelphia: Blakiston Company, 1941.

MLA (9th ed.) Citation

Collings, Gilbeart H. Commercial Fertilizers, Their Sources & Use. 3d edition. Blakiston Company, 1941.