APA (7th ed.) Citation

Freeman, H. (1965). Discrete-time systems: An introduction to the theory. J. Wiley.

Chicago Style (17th ed.) Citation

Freeman, Herbert. Discrete-time Systems: An Introduction to the Theory. New York: J. Wiley, 1965.

MLA (9th ed.) Citation

Freeman, Herbert. Discrete-time Systems: An Introduction to the Theory. J. Wiley, 1965.