Παραπομπή APA

A.P.Verma. (1998). Operations research. S.K.Kataria and Sons.

Παραπομπή Chicago Style

A.P.Verma. Operations Research. Delhi: S.K.Kataria and Sons, 1998.

Παραπομπή MLA

A.P.Verma. Operations Research. S.K.Kataria and Sons, 1998.