Werner, P. K., Spaventa, M., & Nelson, J. P. (2002). Interactions access: Grammar (4th ed.). .McGraw-Hill Contemporary.
Cita Chicago (17th ed.)Werner, Patricia K., Marilynn Spaventa, i John P. Nelson. Interactions Access: Grammar. 4th ed. Boston, MA: .McGraw-Hill Contemporary, 2002.
Cita MLA (8th ed.)Werner, Patricia K., et al. Interactions Access: Grammar. 4th ed. .McGraw-Hill Contemporary, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.