Saaty, T. L., & Kainen, P. C. (1977). The four-color problem : assaults and conquest / (by) Thomas L. Saaty and Paul C. Kainen: Assaults and conquest. McGraw-Hill.
Chicago Style (17th ed.) CitationSaaty, Thomas L., and Paul C. Kainen. The Four-color Problem : Assaults and Conquest / (by) Thomas L. Saaty and Paul C. Kainen: Assaults and Conquest. New York ; London (etc.): McGraw-Hill, 1977.
MLA (9th ed.) CitationSaaty, Thomas L., and Paul C. Kainen. The Four-color Problem : Assaults and Conquest / (by) Thomas L. Saaty and Paul C. Kainen: Assaults and Conquest. McGraw-Hill, 1977.
Warning: These citations may not always be 100% accurate.