APA (7th ed.) Citation

Hillman, A. P., Alexanderson, G. L., & Grassl, R. M. (1987). Discrete and combinatorial mathematics. Dellen.

Chicago Style (17th ed.) Citation

Hillman, Abraham P., Gerald L. Alexanderson, and Richard M. Grassl. Discrete and Combinatorial Mathematics. San Francisco, Calif: Dellen, 1987.

MLA (9th ed.) Citation

Hillman, Abraham P., et al. Discrete and Combinatorial Mathematics. Dellen, 1987.