Feld, W. J., & Boyd, G. (1980). Comparative regional systems: West and East Europe, North America, the Middle East, and developing countries. Pergamon Press.
Chicago-Zitierstil (17. Ausg.)Feld, Werner J., und Gavin;Feld Boyd. Comparative Regional Systems: West and East Europe, North America, the Middle East, and Developing Countries. Pergamon Press, 1980.
MLA-Zitierstil (9. Ausg.)Feld, Werner J., und Gavin;Feld Boyd. Comparative Regional Systems: West and East Europe, North America, the Middle East, and Developing Countries. Pergamon Press, 1980.
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