APA
Helfrick A. D., Coopre William D., . (19902008). Modern Electronic Instrumentation and Measurement Techniques. New Delhi: Prentice-Hall of India Private Limited.
Chicago
Helfrick Albert D, Coopre William D, . 19902008. Modern Electronic Instrumentation and Measurement Techniques. New Delhi: Prentice-Hall of India Private Limited.
Harvard
Helfrick A. D., Coopre William D., . (19902008). Modern Electronic Instrumentation and Measurement Techniques. New Delhi: Prentice-Hall of India Private Limited.
MLA
Helfrick Albert D, Coopre William D, . Modern Electronic Instrumentation and Measurement Techniques. New Delhi: Prentice-Hall of India Private Limited. 19902008.
