APA (7th ed.) Citation

Hartsfield, N., & Ringel, G. (1990). Pearls in graph theory: A comprehensive introduction. Academic Press.

Chicago Style (17th ed.) Citation

Hartsfield, Nora, and Gerhard Ringel. Pearls in Graph Theory: A Comprehensive Introduction. Boston: Academic Press, 1990.

MLA (9th ed.) Citation

Hartsfield, Nora, and Gerhard Ringel. Pearls in Graph Theory: A Comprehensive Introduction. Academic Press, 1990.