APA-referens (7:e uppl.)

Barry, N. P. (1989). An introduction to modern political theory. Macmillan.

Chicago-referens (17:e uppl.)

Barry, Norman P. An Introduction to Modern Political Theory. Houndmills, Basingstoke, Hampshire: Macmillan, 1989.

MLA-referens (9:e uppl.)

Barry, Norman P. An Introduction to Modern Political Theory. Macmillan, 1989.