Cita APA (7a ed.)

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 Publishing.

Cita Chicago Style (17a ed.)

Whitehead, Russell, y 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 MLA (9a ed.)

Whitehead, Russell, y 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 Publishing, 2003.