Helfrick, Albert D, & Cooper, W. D. (1990). Modern Electronic Instrumentation and Measurement Techniques (8120307526.). Prentice-Hall of India.
Citazione stile Chigago Style (17a edizione)Helfrick, Albert D, e William D. Cooper. Modern Electronic Instrumentation and Measurement Techniques. 8120307526. New Delhi: Prentice-Hall of India, 1990.
Citatione MLA (9a ed.)Helfrick, et al. Modern Electronic Instrumentation and Measurement Techniques. 8120307526. Prentice-Hall of India, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.