Cita APA (7a ed.)

Gumplowicz, L. (1980). Outlines of sociology. Transaction Books.

Cita Chicago Style (17a ed.)

Gumplowicz, Ludwig. Outlines of Sociology. New Brunswick, N.J.: Transaction Books, 1980.

Cita MLA (8a ed.)

Gumplowicz, Ludwig. Outlines of Sociology. Transaction Books, 1980.