APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.