APA Style

Greenwood, N. J., Edwards, J. M. B.. (1979). Human Environments and Natural System (2). USA: Duxbury Press.

Chicago Style

Greenwood, N. J., Edwards, J. M. B.. Human Environments and Natural System. 2 USA: Duxbury Press, 1979. Text.

MLA Style

Greenwood, N. J., Edwards, J. M. B.. Human Environments and Natural System. 2 USA: Duxbury Press, 1979. Text.

Turabian Style

Greenwood, N. J., Edwards, J. M. B.. Human Environments and Natural System. 2 USA: Duxbury Press, 1979. Print.