APA (7th ed.) Citation

Tomescu, I. (1985). Problems in combinatorics and graph theory. John Wiley.

Chicago Style (17th ed.) Citation

Tomescu, Ioan. Problems in Combinatorics and Graph Theory. Nueva York: John Wiley, 1985.

MLA (9th ed.) Citation

Tomescu, Ioan. Problems in Combinatorics and Graph Theory. John Wiley, 1985.