Cita APA (7a ed.)

Birkeland, P. W. (1974). Pedology, weathering, and geomorphological research. Oxford University Press.

Cita Chicago Style (17a ed.)

Birkeland, Peter W. Pedology, Weathering, and Geomorphological Research. New York [etc.]: Oxford University Press, 1974.

Cita MLA (9a ed.)

Birkeland, Peter W. Pedology, Weathering, and Geomorphological Research. Oxford University Press, 1974.