ScienceDirect (Online service), Feld, W. J., & Boyd, G. (1980). Comparative regional systems: West and East Europe, North America, the Middle East and developing countries. Pergamon Press.
Chicago Style (17th ed.) CitationScienceDirect (Online service), Werner J. Feld, and Gavin Boyd. Comparative Regional Systems: West and East Europe, North America, the Middle East and Developing Countries. New York: Pergamon Press, 1980.
MLA (9th ed.) CitationScienceDirect (Online service), et al. Comparative Regional Systems: West and East Europe, North America, the Middle East and Developing Countries. Pergamon Press, 1980.
Warning: These citations may not always be 100% accurate.