APA (7th ed.) Citation

Erdös, P., & Graham, R. L. (1980). Old and new problems and results in combinatorial number theory. L' Enseignement Math.

Chicago Style (17th ed.) Citation

Erdös, Paul, and Ronald L. Graham. Old and New Problems and Results in Combinatorial Number Theory. Genève: L' Enseignement Math, 1980.

MLA (9th ed.) Citation

Erdös, Paul, and Ronald L. Graham. Old and New Problems and Results in Combinatorial Number Theory. L' Enseignement Math, 1980.