APA (7th ed.) Citation

Barbour, M. G., & Billings, W. D. (1989). North American terrestrial vegetation (1st published, repr.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Barbour, Michael G., and William Dwight Billings. North American Terrestrial Vegetation. 1st published, repr. Cambridge [etc.]: Cambridge University Press, 1989.

MLA (9th ed.) Citation

Barbour, Michael G., and William Dwight Billings. North American Terrestrial Vegetation. 1st published, repr. Cambridge University Press, 1989.