एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

Helfrick, Albert D., और William David Cooper. Modern Electronic Instrumentation and Measurement Techniques. New Delhi: Prentice Hall, 1990.

एमएलए उद्धरण

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