Cita APA (7th ed.)
Villarreal, O. (1999). Polimodal english: Humanities and social sciences. Macmillan Heinemann.
Cita Chicago (17th ed.)
Villarreal, Omar. Polimodal English: Humanities and Social Sciences. Buenos Aires: Macmillan Heinemann, 1999.
Cita MLA (9th ed.)
Villarreal, Omar. Polimodal English: Humanities and Social Sciences. Macmillan Heinemann, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.