Pile, L., & Williams, A. (2002). Pass cambridge BEC Preliminary: An examination preparation course updated for the revised exam : practice tests. Summertown: Summertown Publishing.
Citación estilo ChicagoPile, Louise, and Anne Williams. Pass Cambridge BEC Preliminary: An Examination Preparation Course Updated for the Revised Exam : Practice Tests. Summertown: Summertown Publishing, 2002.
Cita MLAPile, Louise, and Anne Williams. Pass Cambridge BEC Preliminary: An Examination Preparation Course Updated for the Revised Exam : Practice Tests. Summertown: Summertown Publishing, 2002.
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