Cita APA (7th ed.)

Helfrick, Albert D, & Cooper, W. D. (1990). Modern Electronic Instrumentation and Measurement Techniques (8120307526.). Prentice-Hall of India.

Cita Chicago (17th ed.)

Helfrick, Albert D, i William D. Cooper. Modern Electronic Instrumentation and Measurement Techniques. 8120307526. New Delhi: Prentice-Hall of India, 1990.

Cita MLA (9th ed.)

Helfrick, et al. Modern Electronic Instrumentation and Measurement Techniques. 8120307526. Prentice-Hall of India, 1990.