APA (7th ed.) Citation

Portsmouth Polytechnic. Cartographic Unit, Parry, R. B., & Perkins, C. R. (1987). World mapping today. Butterworths.

Chicago Style (17th ed.) Citation

Portsmouth Polytechnic. Cartographic Unit, Robert B. Parry, and C. R. Perkins. World Mapping Today. London ; Boston: Butterworths, 1987.

MLA (9th ed.) Citation

Portsmouth Polytechnic. Cartographic Unit, et al. World Mapping Today. Butterworths, 1987.