Παραπομπή APA

Sasieni, M., Yaspan, A., & Friedman, L. (1959). Operation research: Methods and problems. Ioppan company.

Παραπομπή Chicago Style

Sasieni, Maurice, Arthur Yaspan, και Lawrence Friedman. Operation Research: Methods and Problems. New York: Ioppan company, 1959.

Παραπομπή MLA

Sasieni, Maurice, et al. Operation Research: Methods and Problems. Ioppan company, 1959.