APA (7th ed.) Citation

Fletcher, R. (1989). Practical methods of optimization (2nd ed.). John Wiley & Sons.

Chicago Style (17th ed.) Citation

Fletcher, Roger. Practical Methods of Optimization. 2nd ed. Chichester [etc.]: John Wiley & Sons, 1989.

MLA (9th ed.) Citation

Fletcher, Roger. Practical Methods of Optimization. 2nd ed. John Wiley & Sons, 1989.