APA-referens (7:e uppl.)

Keith, N. W., & Keith, N. Z. (1988). New perspectives on social class and socioeconomic development in the periphery. Greenwood Press.

Chicago-referens (17:e uppl.)

Keith, Nelson W., och Novella Zett Keith. New Perspectives on Social Class and Socioeconomic Development in the Periphery. New York: Greenwood Press, 1988.

MLA-referens (8:e uppl.)

Keith, Nelson W., och Novella Zett Keith. New Perspectives on Social Class and Socioeconomic Development in the Periphery. Greenwood Press, 1988.