Παραπομπή APA

Helfrick, A. D. (1977). Modern electronic instrumentation and measurement techniques. Prentice-Hall of India.

Παραπομπή Chicago Style

Helfrick, Albert D. Modern Electronic Instrumentation and Measurement Techniques. New Delhi: Prentice-Hall of India, 1977.

Παραπομπή MLA

Helfrick, Albert D. Modern Electronic Instrumentation and Measurement Techniques. Prentice-Hall of India, 1977.