Tweedie, A. D. (1966). Water and the world (revised edition.). Thomas Nelson (Australia) Ltd.
Lua i Stíl Chicago (17ú heag.)Tweedie, Alan D. Water and the World. revised edition. South Australia: Thomas Nelson (Australia) Ltd, 1966.
Lua MLA (9ú heag.)Tweedie, Alan D. Water and the World. revised edition. Thomas Nelson (Australia) Ltd, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.