References
^ (2013). Realidades Communication Workbook With Test Prep (Writing Audio Video Activities) Level A Copyright 2011 ECampus. ISBN 9780133692600 (revised Nov 2023)^ Prentice Hall (2014). Realidades Communication Workbook With Test Prep (Writing Audio Video Activities) Level A Copyright 2011, SCHOOL GROUP. BiggerBooks. ISBN 9780133692600 (revised Nov 2023)
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