Dyfyniad APA

Pearson, L. C. (1967). Principles of agronomy. Affiliated East West Press Pvt Ltd.

Dyfyniad Arddull Chicago

Pearson, Lorentz C. Principles of Agronomy. Newdelhi: Affiliated East West Press Pvt Ltd, 1967.

Dyfyniad MLA

Pearson, Lorentz C. Principles of Agronomy. Affiliated East West Press Pvt Ltd, 1967.

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