APA (7th ed.) Citation

Cook, C., & Walker, W. (2001). The Facts on File world political almanac: From 1945 to the present (4th ed. / rev. by Whitney Walker.). Facts on File.

Chicago Style (17th ed.) Citation

Cook, Chris, and Whitney Walker. The Facts on File World Political Almanac: From 1945 to the Present. 4th ed. / rev. by Whitney Walker. New York: Facts on File, 2001.

MLA (9th ed.) Citation

Cook, Chris, and Whitney Walker. The Facts on File World Political Almanac: From 1945 to the Present. 4th ed. / rev. by Whitney Walker. Facts on File, 2001.