Παραπομπή APA

Saaty, T. L. (1986). The four color problem: Assaults and conquest. Dover Publications.

Παραπομπή Chicago Style

Saaty, Thomas L. The Four Color Problem: Assaults and Conquest. New York: Dover Publications, 1986.

Παραπομπή MLA

Saaty, Thomas L. The Four Color Problem: Assaults and Conquest. Dover Publications, 1986.