Fujishin, R. (2009). The natural speaker (6th ed.). Pearson/Allyn and Bacon.
Cita Chicago (17th ed.)Fujishin, Randy. The Natural Speaker. 6th ed. Boston, Mass: Pearson/Allyn and Bacon, 2009.
Cita MLA (9th ed.)Fujishin, Randy. The Natural Speaker. 6th ed. Pearson/Allyn and Bacon, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.