APA-referens (7:e uppl.)

Gumplowicz, L., & Horowitz, I. L. (1963). Outlines of sociology ([2nd English language ed.].). Paine-Whitman.

Chicago-referens (17:e uppl.)

Gumplowicz, Ludwig, och Irving Louis Horowitz. Outlines of Sociology. [2nd English language ed.]. New York: Paine-Whitman, 1963.

MLA-referens (9:e uppl.)

Gumplowicz, Ludwig, och Irving Louis Horowitz. Outlines of Sociology. [2nd English language ed.]. Paine-Whitman, 1963.