APA (7th ed.) Citation

Mager, N. H., Mager, S. K., & Mager, P. S. (1978). Power writing, power speaking: 200 ways to make your words count. Morrow.

Chicago Style (17th ed.) Citation

Mager, N. H., S. K. Mager, and P. S. Mager. Power Writing, Power Speaking: 200 Ways to Make Your Words Count. New York: Morrow, 1978.

MLA (9th ed.) Citation

Mager, N. H., et al. Power Writing, Power Speaking: 200 Ways to Make Your Words Count. Morrow, 1978.