Dyfyniad APA

Fitzpatrick, E. A. (1986). Soils: Their formation, classification and distribution.

Dyfyniad Arddull Chicago

Fitzpatrick, E A. Soils: Their Formation, Classification and Distribution. England, Longman Scientific and Technical, 1986.

Dyfyniad MLA

Fitzpatrick, E A. Soils: Their Formation, Classification and Distribution. 1986.

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