APA استشهاد

Oetti, W., & Ritter, K. (1976). Optimizations and operations research. Springer - Verlag.

استشهاد بنمط شيكاغو

Oetti, W., و K. Ritter. Optimizations and Operations Research. New York: Springer - Verlag, 1976.

MLA استشهاد

Oetti, W., و K. Ritter. Optimizations and Operations Research. Springer - Verlag, 1976.