Sobczak, A. (2020). Smart Calling: Eliminate the Fear, Failure, and Rejection from Cold Calling (3rd ed.). John Wiley & Sons, Incorporated.
Chicago-Zitierstil (17. Ausg.)Sobczak, Art. Smart Calling: Eliminate the Fear, Failure, and Rejection from Cold Calling. 3rd ed. Newark: John Wiley & Sons, Incorporated, 2020.
MLA-Zitierstil (9. Ausg.)Sobczak, Art. Smart Calling: Eliminate the Fear, Failure, and Rejection from Cold Calling. 3rd ed. John Wiley & Sons, Incorporated, 2020.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.