Barry, N. P. (1989). An introduction to modern political theory. Macmillan.
芝加哥风格引文Barry, Norman P. An Introduction to Modern Political Theory. Houndmills, Basingstoke, Hampshire: Macmillan, 1989.
MLA引文Barry, Norman P. An Introduction to Modern Political Theory. Macmillan, 1989.
警告：这些引文格式不一定是100％准确.