Cooper , W. . D. . .., & Helfrick , A. D. . .. (1985). Electronic instrumentation and measurement techniques (3rd ed.). Prentice Hall of India.
Chicago-viite (17. p.)Cooper , William David ., ja Albert D. Helfrick. Electronic Instrumentation and Measurement Techniques. 3rd ed. New Delhi: Prentice Hall of India, 1985.
MLA-viite (9. p.)Cooper , William David ., ja Albert D. Helfrick. Electronic Instrumentation and Measurement Techniques. 3rd ed. Prentice Hall of India, 1985.
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