DOUGLAS, I. [., & SPENCER, T. [. (1985). Environmental change and tropical geomorphology. George Allen and Unwin.
Lua i Stíl Chicago (17ú heag.)DOUGLAS, I [ED.], agus T [ED.] SPENCER. Environmental Change and Tropical Geomorphology. London: George Allen and Unwin, 1985.
Lua MLA (9ú heag.)DOUGLAS, I [ED.], agus T [ED.] SPENCER. Environmental Change and Tropical Geomorphology. George Allen and Unwin, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.