APA Style

Oppenheim, A, V., Schafer, R, W. (2014). Discrete-time signal processing. Third New International Edition (Third New International Edition). Harlow: Pearson.

MLA Style

Oppenheim, Alan, V.., Schafer, Ronald, W. "Discrete-time signal processing. Third New International Edition". Third New International Edition Harlow: Pearson, 2014. Text.