Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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