Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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