O'Dell, F., & Broadhead, A. (2014). Objective advanced: [C1 English profile ; for revised exam from 2015 ; Cambridge official preparation material] (4. ed.). Cambridge Univ. Press.
Chicago-Zitierstil (17. Ausg.)O'Dell, Felicity, und Annie Broadhead. Objective Advanced: [C1 English Profile ; for Revised Exam from 2015 ; Cambridge Official Preparation Material]. 4. ed. Cambridge: Cambridge Univ. Press, 2014.
MLA-Zitierstil (9. Ausg.)O'Dell, Felicity, und Annie Broadhead. Objective Advanced: [C1 English Profile ; for Revised Exam from 2015 ; Cambridge Official Preparation Material]. 4. ed. Cambridge Univ. Press, 2014.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.