APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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