Cita APA (7a ed.)

Collings, G. H. (1941). Commercial fertilizer: Their sources and use (3rd. ed.). Blakiston.

Cita Chicago Style (17a ed.)

Collings, Gilbeart H. Commercial Fertilizer: Their Sources and Use. 3rd. ed. Philadelphia: Blakiston, 1941.

Cita MLA (8a ed.)

Collings, Gilbeart H. Commercial Fertilizer: Their Sources and Use. 3rd. ed. Blakiston, 1941.