Levin, B. (1993). English verb classes and alternations: A preliminary investigation. University of Chicago.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLevin, Beth. English Verb Classes and Alternations: A Preliminary Investigation. Chicago: University of Chicago, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLevin, Beth. English Verb Classes and Alternations: A Preliminary Investigation. University of Chicago, 1993.
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