Kerwin, M. (1995). Topics and language competencies. Prentice Hall Regents.
Citazione stile Chigago Style (17a edizione)Kerwin, Michael. Topics and Language Competencies. Upper Saddle River, N.J: Prentice Hall Regents, 1995.
Citatione MLA (9a ed.)Kerwin, Michael. Topics and Language Competencies. Prentice Hall Regents, 1995.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.