APA (7th ed.) Citation

Collatz, L., & Wetterling, W. (1975). Optimization Problems. Springer US.

Chicago Style (17th ed.) Citation

Collatz, L., and W. Wetterling. Optimization Problems. New York, NY: Springer US, 1975.

MLA (9th ed.) Citation

Collatz, L., and W. Wetterling. Optimization Problems. Springer US, 1975.