JOHNSTON ROBERT. (2008). SERVICE OPERASTIONS MANAGEMENT (2ND ED.). PEARSON EDUCATION.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJOHNSTON ROBERT. SERVICE OPERASTIONS MANAGEMENT. 2ND ED. INDIA: PEARSON EDUCATION, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJOHNSTON ROBERT. SERVICE OPERASTIONS MANAGEMENT. 2ND ED. PEARSON EDUCATION, 2008.
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