Nelson, M. (2013). Guide to the presidency and the executive branch (5th ed.). CQ Press.
Chicago-Zitierstil (17. Ausg.)Nelson, Michael. Guide to the Presidency and the Executive Branch. 5th ed. Thousand Oaks, Calif: CQ Press, 2013.
MLA-Zitierstil (9. Ausg.)Nelson, Michael. Guide to the Presidency and the Executive Branch. 5th ed. CQ Press, 2013.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.