Campbell, W. J. (2020). Lost in a Gallup: Polling failure in U.S. presidential elections. University of California Press.
Chicago-Zitierstil (17. Ausg.)Campbell, W. Joseph. Lost in a Gallup: Polling Failure in U.S. Presidential Elections. Oakland, California: University of California Press, 2020.
MLA-Zitierstil (9. Ausg.)Campbell, W. Joseph. Lost in a Gallup: Polling Failure in U.S. Presidential Elections. University of California Press, 2020.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.