Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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