APA (7th ed.) Citation

Humphreys, G. S. (1991). The use of unstable steeplands in the mountains of Papua New Guinea. University of California Press.

Chicago Style (17th ed.) Citation

Humphreys, Geoff S. The Use of Unstable Steeplands in the Mountains of Papua New Guinea. California: University of California Press, 1991.

MLA (9th ed.) Citation

Humphreys, Geoff S. The Use of Unstable Steeplands in the Mountains of Papua New Guinea. University of California Press, 1991.