Dyfyniad APA

Tisdale, S., & Nelson, W. L. (1975). Soil fertility and fertilizers. Macmillan publishing.

Dyfyniad Arddull Chicago

Tisdale, Samuel, and Werner L. Nelson. Soil Fertility and Fertilizers. New York: Macmillan publishing, 1975.

Dyfyniad MLA

Tisdale, Samuel, and Werner L. Nelson. Soil Fertility and Fertilizers. Macmillan publishing, 1975.

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