Rossner, R. (1984). Contemporary english: Student's workbook. Macmillan.
Cita Chicago (17th ed.)Rossner, R. Contemporary English: Student's Workbook. Macmillan, 1984.
Cita MLA (9th ed.)Rossner, R. Contemporary English: Student's Workbook. Macmillan, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.