APA
Oppenheim Alan V, Willsky Alan S, . (1987). Signals and systems. New Delhi: PRENTICE HALL OF INDIA.
Chicago
Oppenheim Alan V, Willsky Alan S, . 1987. Signals and systems. New Delhi: PRENTICE HALL OF INDIA.
Harvard
Oppenheim Alan V, Willsky Alan S, . (1987). Signals and systems. New Delhi: PRENTICE HALL OF INDIA.
MLA
Oppenheim Alan V, Willsky Alan S, . Signals and systems. New Delhi: PRENTICE HALL OF INDIA. 1987.