APA (7th ed.) Citation

Gelb, A., & Vander Velde, W. E. (1968). Multiple-input describing functions and nonlinear system design. McGraw-Hill.

Chicago Style (17th ed.) Citation

Gelb, Arthur, and Wallace E. Vander Velde. Multiple-input Describing Functions and Nonlinear System Design. New York: McGraw-Hill, 1968.

MLA (9th ed.) Citation

Gelb, Arthur, and Wallace E. Vander Velde. Multiple-input Describing Functions and Nonlinear System Design. McGraw-Hill, 1968.