Dyfyniad APA

Keefer, R. F. (2000). Handbook of soils for landscape architects. Oxford University.

Dyfyniad Arddull Chicago

Keefer, Robert F. Handbook of Soils for Landscape Architects. New York: Oxford University, 2000.

Dyfyniad MLA

Keefer, Robert F. Handbook of Soils for Landscape Architects. Oxford University, 2000.

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