Cita APA (7th ed.)

Helfrick, A. D., & Cooper, W. D. (1990). Modern electronic instrumentation and measurement techniques. Prentice Hall.

Cita Chicago (17th ed.)

Helfrick, Albert D., i William D. Cooper. Modern Electronic Instrumentation and Measurement Techniques. New Jersey: Prentice Hall, 1990.

Cita MLA (9th ed.)

Helfrick, Albert D., i William D. Cooper. Modern Electronic Instrumentation and Measurement Techniques. Prentice Hall, 1990.