Birkhoff, G. (1976). House monotone apportionment schemes.
Citação norma ChicagoBirkhoff, Garrett. House Monotone Apportionment Schemes. 1976.
MLA引文Birkhoff, Garrett. House Monotone Apportionment Schemes. 1976.
警告：這些引文格式不一定是100％准確.
APA引文