Gregory, K. (1973). Drainage basin form and process: A geomorphological approach. Arnold.
Lua i Stíl Chicago (17ú heag.)Gregory, K.J. Drainage Basin Form and Process: A Geomorphological Approach. London: Arnold, 1973.
Lua MLA (9ú heag.)Gregory, K.J. Drainage Basin Form and Process: A Geomorphological Approach. Arnold, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.