APA aipamena

Collatz, L., & Wetterling, W. W. E. (1975). Optimization problems. Springer-Verlag.

Chicago Style aipamena

Collatz, L., and Wolfgang W. E. Wetterling. Optimization Problems. New York: Springer-Verlag, 1975.

MLA aipamena

Collatz, L., and Wolfgang W. E. Wetterling. Optimization Problems. Springer-Verlag, 1975.