APA Format
Horwill, George. (1925).
Proportional representation : its dangers and defects / George Horwill
. London :: George Allen & Unwin,.
MLA Format
Horwill, George.
Proportional representation : its dangers and defects / George Horwill
. London :: George Allen & Unwin,, 1925
Chicago Format
Horwill, George. Proportional representation : its dangers and defects / George Horwill. London :: George Allen & Unwin,, 1925.