Portes, A. (1981). Labor, class, and the international system. Academic Press.
芝加哥风格引文Portes, Alejandro. Labor, Class, and the International System. New York: Academic Press, 1981.
MLA引文Portes, Alejandro. Labor, Class, and the International System. Academic Press, 1981.
警告：这些引文格式不一定是100％准确.