APA استشهاد

Gabel,, R. A., & Roberts,, R. A. (2009). Signals and linear systems (3rd.). John wiley and sons.

استشهاد بنمط شيكاغو

Gabel,, Robert A., و Richard A. Roberts. Signals and Linear Systems. 3rd. New York: John wiley and sons, 2009.

MLA استشهاد

Gabel,, Robert A., و Richard A. Roberts. Signals and Linear Systems. 3rd. John wiley and sons, 2009.