APA (7th ed.) Citation

Philip Lief Group, Princeton Language Institute, & Laskowski. (2001). 10 days to more confident public speaking. Warner Books.

Chicago Style (17th ed.) Citation

Philip Lief Group, Princeton Language Institute, and Laskowski. 10 Days to More Confident Public Speaking. New York: Warner Books, 2001.

MLA (8th ed.) Citation

Philip Lief Group, et al. 10 Days to More Confident Public Speaking. Warner Books, 2001.