APA-ийн эшлэл(7 дахь хэвлэлт)

Leong, G. C., & Morgan, G. C. (1982). Human and economic geography (2nd ed.). Oxford University.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Leong, Goh Cheng, ба Gillian C. Morgan. Human and Economic Geography. 2nd ed. Oxford: Oxford University, 1982.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Leong, Goh Cheng, ба Gillian C. Morgan. Human and Economic Geography. 2nd ed. Oxford University, 1982.