Παραπομπή APA

Operations Research Society of America. (1976). Ballettin of operations research society of America. Operations Research Society of America.

Παραπομπή Chicago Style

Operations Research Society of America. Ballettin of Operations Research Society of America. Operations Research Society of America, 1976.

Παραπομπή MLA

Operations Research Society of America. Ballettin of Operations Research Society of America. Operations Research Society of America, 1976.