Cita APA (7th ed.)

Birkeland, P. W. (1999). Soils and geomorphology (3rd ed.). Oxford University Press.

Cita Chicago (17th ed.)

Birkeland, Peter W. Soils and Geomorphology. 3rd ed. New York: Oxford University Press, 1999.

Cita MLA (9th ed.)

Birkeland, Peter W. Soils and Geomorphology. 3rd ed. Oxford University Press, 1999.