Gaya APA

Arana, A, A., Arana, O. (1991). Workbook To Accompany: Que Tal ? An Introductory Course (Ed.3). New York: McGraw-Hill.

Gaya MLA

Arana, Alice, A.., Arana, Oswaldo. "Workbook To Accompany: Que Tal ? An Introductory Course". Ed.3 New York: McGraw-Hill, 1991. .