Whitehead, R., & Black, M. (2003). Pass cambridge BEC higher: An examination preparation course updated for the revised exam : preactice tests with audio CD and answer key (Revised ed.). Summertown: Summertown Publishing.
Citación estilo ChicagoWhitehead, Russell, and Michael Black. Pass Cambridge BEC Higher: An Examination Preparation Course Updated for the Revised Exam : Preactice Tests With Audio CD and Answer Key. Revised ed. Summertown: Summertown Publishing, 2003.
Cita MLAWhitehead, Russell, and Michael Black. Pass Cambridge BEC Higher: An Examination Preparation Course Updated for the Revised Exam : Preactice Tests With Audio CD and Answer Key. Revised ed. Summertown: Summertown Publishing, 2003.
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