APA (7th ed.) Citation

Santos, H. J. d. l. (2021). Understanding communications systems principles -- a tutorial approach. River Publishers.

Chicago Style (17th ed.) Citation

Santos, Héctor J. de los. Understanding Communications Systems Principles -- a Tutorial Approach. [Place of publication not identified]: River Publishers, 2021.

MLA (9th ed.) Citation

Santos, Héctor J. de los. Understanding Communications Systems Principles -- a Tutorial Approach. River Publishers, 2021.