Goh Cheng Leong & Sundaram, D. (1980). Practical geography. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Goh Cheng Leong agus Dickson Sundaram. Practical Geography. Kuala Lumpur: Oxford University Press, 1980.
Lua MLA (9ú heag.)Goh Cheng Leong agus Dickson Sundaram. Practical Geography. Oxford University Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.