Lloyd, A. C., Poland, R. P., Rossetti, A. D., Winger, F. E., Hanson, R. N., & Ober, S. (1985). Keyboarding: Adapted from Gregg College Typing, Series Five. New York: Gregg Division/McGraw Hill.

Lloyd, Alan C., Robert P. Poland, Albert D. Rossetti, Fred E. Winger, Robert N. Hanson, and Scot Ober. Keyboarding: Adapted From Gregg College Typing, Series Five. New York: Gregg Division/McGraw Hill, 1985.

Lloyd, Alan C., et al. Keyboarding: Adapted From Gregg College Typing, Series Five. New York: Gregg Division/McGraw Hill, 1985.