Dyfyniad APA

International Potash Institute. Fertilizer use and plant health.

Dyfyniad Arddull Chicago

International Potash Institute. Fertilizer Use and Plant Health.

Dyfyniad MLA

International Potash Institute. Fertilizer Use and Plant Health.

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