Cita APA (7a ed.)

Collings, G. H. (1947). Commercial fertilizers: Their sources and use (4th edition.). Blakiston.

Cita Chicago Style (17a ed.)

Collings, Gilbeart H. Commercial Fertilizers: Their Sources and Use. 4th edition. Philadelphia: Blakiston, 1947.

Cita MLA (8a ed.)

Collings, Gilbeart H. Commercial Fertilizers: Their Sources and Use. 4th edition. Blakiston, 1947.