Cita APA (7th ed.)
Villarreal, O., & Greca, M. l. (1999). Polimodal english: Economics and management. Macmillan Heinemann.
Cita Chicago (17th ed.)
Villarreal, Omar, i Marion la Greca. Polimodal English: Economics and Management. Buenos Aires: Macmillan Heinemann, 1999.
Cita MLA (9th ed.)
Villarreal, Omar, i Marion la Greca. Polimodal English: Economics and Management. Macmillan Heinemann, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.