Dyfyniad APA

Foth, H., & Thurk, L. (1972). Fundamentals of soil science (5th ed.). Wiley Eastern.

Dyfyniad Arddull Chicago

Foth, H.D, and L.M Thurk. Fundamentals of Soil Science. 5th ed. New Delhi: Wiley Eastern, 1972.

Dyfyniad MLA

Foth, H.D, and L.M Thurk. Fundamentals of Soil Science. 5th ed. Wiley Eastern, 1972.

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