Παραπομπή APA

Biswal, P. C. (2009). Discrete mathematics and graph theory .- 2nd ed (2nd ed.). PHI Learning Private Ltd.

Παραπομπή Chicago Style

Biswal, Purna Chandra. Discrete Mathematics and Graph Theory .- 2nd Ed. 2nd ed. New Delhi: PHI Learning Private Ltd, 2009.

Παραπομπή MLA

Biswal, Purna Chandra. Discrete Mathematics and Graph Theory .- 2nd Ed. 2nd ed. PHI Learning Private Ltd, 2009.