APA (7th ed.) Citation
Johnson, J. R. (1989). Introduction to digital signal processing. Prentice Hall.
Chicago Style (17th ed.) Citation
Johnson, Johnny R. Introduction to Digital Signal Processing. Englewood Cliffs, NJ: Prentice Hall, 1989.
MLA (9th ed.) Citation
Johnson, Johnny R. Introduction to Digital Signal Processing. Prentice Hall, 1989.
Warning: These citations may not always be 100% accurate.