Ritter, D. F., Kochel,. R. Craig, & Miller, J. R. Process geomorphology (4th ed.).
Lua i Stíl Chicago (17ú heag.)Ritter, Dale F., Kochel,. R. Craig, agus Jerry R. Miller. Process Geomorphology. 4th ed.
Lua MLA (8ú heag.)Ritter, Dale F., et al. Process Geomorphology. 4th ed.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.