Ringel, G. (1974). Map color theorem. Berlin: Springer- Verlag.
Chicago Style CitationRingel, Gerhard. Map Color Theorem. Berlin: Springer- Verlag, 1974.
MLA CitationRingel, Gerhard. Map Color Theorem. Berlin: Springer- Verlag, 1974.
Warning: These citations may not always be 100% accurate.