APA استشهاد

Oettli,W, Oettli, W., & Ritter, K. (1976). Optimization and operations research. Springer-Verlag.

استشهاد بنمط شيكاغو

Oettli,W, W. Oettli, و K. Ritter. Optimization and Operations Research. Berlin ; New York: Springer-Verlag, 1976.

MLA استشهاد

Oettli,W, et al. Optimization and Operations Research. Springer-Verlag, 1976.