APA

Barnes J. F., Tripp M. C. & Skidmore M. J. (1980). The world of politics. New York: St. Martin's Press.

Chicago

Barnes James Franklin, Tripp Marshall Carter and Skidmore Max J. 1980. The world of politics. New York: St. Martin's Press.

Harvard

Barnes J. F., Tripp M. C. and Skidmore M. J. (1980). The world of politics. New York: St. Martin's Press.

MLA

Barnes James Franklin, Tripp Marshall Carter and Skidmore Max J. The world of politics. New York: St. Martin's Press. 1980.