Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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