APA aipamena

Young, A., & Young, D. M. (1974). Slope development.

Chicago Style aipamena

Young, Anthony, and Doreen M. Young. Slope Development. London, Macmillan education Ltd, 1974.

MLA aipamena

Young, Anthony, and Doreen M. Young. Slope Development. 1974.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.