SPENCER RICHARD H. (1983). PLANNING,IMPLEMENTATION & CONTROL IN PRODUCT TEST & ASSURANCE. PRENTICE -HALL INTERNATIONAL, INC.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSPENCER RICHARD H. PLANNING,IMPLEMENTATION & CONTROL IN PRODUCT TEST & ASSURANCE. NEW JERSEY, U.S.A: PRENTICE -HALL INTERNATIONAL, INC, 1983.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSPENCER RICHARD H. PLANNING,IMPLEMENTATION & CONTROL IN PRODUCT TEST & ASSURANCE. PRENTICE -HALL INTERNATIONAL, INC, 1983.
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