Dyfyniad APA

Mengel, K. (2001). Principles of plant nutrition. Switzelend: International Potash Institute.

Dyfyniad Arddull Chicago

Mengel, Konrad. Principles of Plant Nutrition. Switzelend: International Potash Institute, 2001.

Dyfyniad MLA

Mengel, Konrad. Principles of Plant Nutrition. Switzelend: International Potash Institute, 2001.

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