Dyfyniad APA

Mengel, K., Kirkby, E. A., Kosegarten, H., & Appel, T. (2001). Principles of plant nutrition (5th Edition.). Kluwer Academic Publishers.

Dyfyniad Arddull Chicago

Mengel, Konrad, Ernest A. Kirkby, Harald Kosegarten, and Thomas Appel. Principles of Plant Nutrition. 5th Edition. Dordrecht, The Netherlands: Kluwer Academic Publishers, 2001.

Dyfyniad MLA

Mengel, Konrad, et al. Principles of Plant Nutrition. 5th Edition. Kluwer Academic Publishers, 2001.

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