Cita APA (7a ed.)

Barry, N. P. (1989). An introduction to modern political theory (2nd ed.). MacMillan.

Cita Chicago Style (17a ed.)

Barry, Norman P. An Introduction to Modern Political Theory. 2nd ed. Basingstoke [etc.]: MacMillan, 1989.

Cita MLA (9a ed.)

Barry, Norman P. An Introduction to Modern Political Theory. 2nd ed. MacMillan, 1989.