SINGH A N. (1993). PREPARATION, IMPLEMENTATION & REGISTRATION OF ISO 9000 QUALITY SYSTEM. DOLPHIN PUBLICATION.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSINGH A N. PREPARATION, IMPLEMENTATION & REGISTRATION OF ISO 9000 QUALITY SYSTEM. NEW DELHI: DOLPHIN PUBLICATION, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSINGH A N. PREPARATION, IMPLEMENTATION & REGISTRATION OF ISO 9000 QUALITY SYSTEM. DOLPHIN PUBLICATION, 1993.
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