Spilker, B. (1994). Multinational pharmaceutical companies: Principles and practices (2nd ed.). Raven Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpilker, Bert. Multinational Pharmaceutical Companies: Principles and Practices. 2nd ed. New York: Raven Press, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSpilker, Bert. Multinational Pharmaceutical Companies: Principles and Practices. 2nd ed. Raven Press, 1994.
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