Dougherty, James E. et Pfaltzgraff, Robert L., Contending Theories of International Relations, Philadelphie, J.B. Lippincott, 1971, 416 p. / Reynolds, P.A., An Introduction to International Relations, Londres, Longman, 1971, 275 p. / Forward, Nigel, The Field of Nations, Londres, Macmillan, 1971, 207 p. - de Kerckhove, Ferry (Études internationales)