Dyfyniad APA

World Fertilizer Conference Los Angeles, Calif, & Fertilizer Institute. (1988). Proceedings. The Fertilizer Institute.

Dyfyniad Arddull Chicago

World Fertilizer Conference Los Angeles, Calif, and Fertilizer Institute. Proceedings. Washington, D.C.: The Fertilizer Institute, 1988.

Dyfyniad MLA

World Fertilizer Conference Los Angeles, Calif, and Fertilizer Institute. Proceedings. The Fertilizer Institute, 1988.

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