Adams, J. P., Prather, E. E., Slater, T. F., Dostal, J. A., & Physics Education Research (CAPER) Team. (2005). Lecture-tutorials for introductory astronomy. Upper Saddle River, N.J.: Pearson Prentice Hall.

Adams, Jeffrey P., Edward E. Prather, Timothy F. Slater, Jack A. Dostal, and Physics Education Research (CAPER) Team. Lecture-tutorials for Introductory Astronomy. Upper Saddle River, N.J.: Pearson Prentice Hall, 2005.

Adams, Jeffrey P., et al. Lecture-tutorials for Introductory Astronomy. Upper Saddle River, N.J.: Pearson Prentice Hall, 2005.