选举欠票Voluntary Voting System Guidelines 互联网档案馆的存檔,存档日期2008-06-13., pA-18 Election Assistance Commission. Alvarez, R. Michael; Katz, Jonathan N.; Hill, Jonathan N. Machines
过分投票Voluntary Voting System Guidelines 互联网档案馆的存檔,存档日期2008-06-13., pA-13 Election Assistance Commission Robert, Henry M. (2011). Robert's Rules of Order Newly Revised