Quattrini, J. A. (1996). Speaking by doing: A speaking-listening text (7th ed.). National Textbook.
Cita Chicago (17th ed.)Quattrini, Joseph A. Speaking by Doing: A Speaking-listening Text. 7th ed. Lincolnwood, Ill., USA: National Textbook, 1996.
Cita MLA (8th ed.)Quattrini, Joseph A. Speaking by Doing: A Speaking-listening Text. 7th ed. National Textbook, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.