Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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