Cita APA (7a ed.)

Williams, P. J. (1982). The surface of the earth: An introduction to geotechnical science. Longman.

Cita Chicago Style (17a ed.)

Williams, Peter J. The Surface of the Earth: An Introduction to Geotechnical Science. London: Longman, 1982.

Cita MLA (9a ed.)

Williams, Peter J. The Surface of the Earth: An Introduction to Geotechnical Science. Longman, 1982.