Leong, G. C., & Morgan, G. C. (1982). Human and economic geography (2nd ed.). Oxford University.
Chicago-čujuhus (17. p.)Leong, Goh Cheng, juo Gillian C. Morgan. Human and Economic Geography. 2nd ed. Oxford: Oxford University, 1982.
MLA-čujuhus (9. p.)Leong, Goh Cheng, juo Gillian C. Morgan. Human and Economic Geography. 2nd ed. Oxford University, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.