APA-referens (7:e uppl.)

Thomas, W. A. (1972). Indicators of environmental quality. Plenum Press.

Chicago-referens (17:e uppl.)

Thomas, William A. Indicators of Environmental Quality. New York: Plenum Press, 1972.

MLA-referens (9:e uppl.)

Thomas, William A. Indicators of Environmental Quality. Plenum Press, 1972.