Cita APA (7th ed.)
Burgess, S., & O'Neill, R. (1997). Longman english works: Workbook 1. Longman.
Cita Chicago (17th ed.)
Burgess, Sally, i Robert O'Neill. Longman English Works: Workbook 1. England: Longman, 1997.
Cita MLA (9th ed.)
Burgess, Sally, i Robert O'Neill. Longman English Works: Workbook 1. Longman, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.