APA (7th ed.) Citation

Gabel, R. A., & Roberts, R. A. (1973). Signals and linear systems. Wiley.

Chicago Style (17th ed.) Citation

Gabel, Robert A., and Richard A. Roberts. Signals and Linear Systems. New York: Wiley, 1973.

MLA (9th ed.) Citation

Gabel, Robert A., and Richard A. Roberts. Signals and Linear Systems. Wiley, 1973.