Kellough, R. D., Kellough, N. G., & Kim, E. C. (1999). Secondary school teaching: A guide to methods and resources : planning for competence (rev. ed.). Merrill.

Kellough, Richard D., Noreen G. Kellough, and Eugene C. Kim. Secondary School Teaching: A Guide to Methods and Resources : Planning for Competence. rev. ed. Upper Saddle River, N.J: Merrill, 1999.

Kellough, Richard D., et al. Secondary School Teaching: A Guide to Methods and Resources : Planning for Competence. rev. ed. Merrill, 1999.