Timm, P. R. (1997). Winning telephone tips: 30 fast and profitable tips for making the best use of your phone. Career Press.
Chicago-Zitierstil (17. Ausg.)Timm, Paul R. Winning Telephone Tips: 30 Fast and Profitable Tips for Making the Best Use of Your Phone. Franklin Lakes, NJ: Career Press, 1997.
MLA-Zitierstil (9. Ausg.)Timm, Paul R. Winning Telephone Tips: 30 Fast and Profitable Tips for Making the Best Use of Your Phone. Career Press, 1997.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.