APA citiranje

Gregory, K. J., & Lewin, J. (2014). The basics of geomorphology. Sage.

Chicago Edition Citation

Gregory, K. J., and John Lewin. The Basics of Geomorphology. Los Angeles: Sage, 2014.

MLA citiranje

Gregory, K. J., and John Lewin. The Basics of Geomorphology. Sage, 2014.