APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Collatz, Lothar, and W. Wetterling. Optimization Problems. Nueva York: Springer-Verlag, 1975.

MLA (9th ed.) Citation

Collatz, Lothar, and W. Wetterling. Optimization Problems. Springer-Verlag, 1975.