APA-referens

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

Chicago-stil citat

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

MLA-referens

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