Cita APA (7a ed.)

Vale, T. R. (1982). Plants and people: Vegetation change in North America. Association of American Geographers.

Cita Chicago Style (17a ed.)

Vale, Thomas R. Plants and People: Vegetation Change in North America. Washington, D.C.: Association of American Geographers, 1982.

Cita MLA (9a ed.)

Vale, Thomas R. Plants and People: Vegetation Change in North America. Association of American Geographers, 1982.