Side R. Richard & Wellman G. Guy. (2000). Grammar and Vocabulary for Cambridge Advanced and Proficiency. Longman, 2000.
Cita Chicago (17th ed.)Side R. Richard i Wellman G. Guy. Grammar and Vocabulary for Cambridge Advanced and Proficiency. Longman, 2000, 2000.
Cita MLA (9th ed.)Side R. Richard i Wellman G. Guy. Grammar and Vocabulary for Cambridge Advanced and Proficiency. Longman, 2000, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.