Cita APA (7a ed.)

Krabs, W. (1979). Optimization and approximation. John Wiley.

Cita Chicago Style (17a ed.)

Krabs, Werner. Optimization and Approximation. Chichester [etc.]: John Wiley, 1979.

Cita MLA (9a ed.)

Krabs, Werner. Optimization and Approximation. John Wiley, 1979.