APA (7th ed.) Citation

Ringel, G. (1974). Map color theorem. Springer.

Chicago Style (17th ed.) Citation

Ringel, Gerhard. Map Color Theorem. Berlin [u.a.]: Springer, 1974.

MLA (9th ed.) Citation

Ringel, Gerhard. Map Color Theorem. Springer, 1974.

Warning: These citations may not always be 100% accurate.