APA
Lewis P. G., Potter D. C. j. a. & Castles F. G. (1978). The practice of comparative politics. London: Longman.
Chicago
Lewis Paul G, Potter David C joint author and Castles Francis Geoffrey. 1978. The practice of comparative politics. London: Longman.
Harvard
Lewis P. G., Potter D. C. j. a. and Castles F. G. (1978). The practice of comparative politics. London: Longman.
MLA
Lewis Paul G, Potter David C joint author and Castles Francis Geoffrey. The practice of comparative politics. London: Longman. 1978.