APA-ийн эшлэл(7 дахь хэвлэлт)

GREENWOOD, N., & EDWARDS, J. (1979). Human environments and natural systems. -- 2nd ed. Duxbury Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

GREENWOOD, N.H, ба J.M.B EDWARDS. Human Environments and Natural Systems. -- 2nd Ed. North Scituate: Duxbury Press, 1979.

MLA -ийн эшлэл (9 дэх хэвлэлт)

GREENWOOD, N.H, ба J.M.B EDWARDS. Human Environments and Natural Systems. -- 2nd Ed. Duxbury Press, 1979.