Keefer, R. F. (2000). Handbook of soils for landscape architects. Oxford University Press.
Citazione stile Chigago Style (17a edizione)Keefer, Robert F. Handbook of Soils for Landscape Architects. New York: Oxford University Press, 2000.
Citatione MLA (9a ed.)Keefer, Robert F. Handbook of Soils for Landscape Architects. Oxford University Press, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.