Levin, B. (1993). English verb classes and alternations: A preliminary investigation. University of Chicago.
Citazione stile Chigago Style (17a edizione)Levin, Beth. English Verb Classes and Alternations: A Preliminary Investigation. Chicago: University of Chicago, 1993.
Citatione MLA (9a ed.)Levin, Beth. English Verb Classes and Alternations: A Preliminary Investigation. University of Chicago, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.