Baldwin, R., Blass, L., Hartmann, P., Mentel, J., Nelson, J. P., Spaventa, M., . . . Werner, P. K. (2003). Interactions access: Integrated skills. N.Y.: McGraw-Hill/Contemporary.

Baldwin, Robert., Laurie Blass, Pamela Hartmann, James Mentel, John P. Nelson, Marilynn Spaventa, Emily Austin Thrush, và Patricia K. Werner. Interactions Access: Integrated Skills. N.Y.: McGraw-Hill/Contemporary, 2003.

Baldwin, Robert., et al. Interactions Access: Integrated Skills. N.Y.: McGraw-Hill/Contemporary, 2003.