Purdue Research Foundation & Purdue University. Department of Foreign Languages & Literatures. (1996). Global business languages. Purdue Research Foundation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPurdue Research Foundation और Purdue University. Department of Foreign Languages & Literatures. Global Business Languages. West Lafayette, IN: Purdue Research Foundation, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPurdue Research Foundation और Purdue University. Department of Foreign Languages & Literatures. Global Business Languages. Purdue Research Foundation, 1996.
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