Dyfyniad APA

Gustafson, A. (1997). Hand book of fertilizers: Their sources, makeup, effects and use. ABP.

Dyfyniad Arddull Chicago

Gustafson, A.F. Hand Book of Fertilizers: Their Sources, Makeup, Effects and Use. New Delhi: ABP, 1997.

Dyfyniad MLA

Gustafson, A.F. Hand Book of Fertilizers: Their Sources, Makeup, Effects and Use. ABP, 1997.

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