Burns, G. T. (1991). Theoretical and historical perspectives on change in language study. Solidaridad Publishing House.
Chicago-referens (17:e uppl.)Burns, Gerald T. Theoretical and Historical Perspectives on Change in Language Study. Manila: Solidaridad Publishing House, 1991.
MLA-referens (9:e uppl.)Burns, Gerald T. Theoretical and Historical Perspectives on Change in Language Study. Solidaridad Publishing House, 1991.
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