Dyfyniad APA

Collings, G. H. (2002). Commercial fertilizers: Their sources and use (4th ed.). Biotech Books.

Dyfyniad Arddull Chicago

Collings, Gilbeart H. Commercial Fertilizers: Their Sources and Use. 4th ed. Delhi: Biotech Books, 2002.

Dyfyniad MLA

Collings, Gilbeart H. Commercial Fertilizers: Their Sources and Use. 4th ed. Biotech Books, 2002.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.