^Until 1987, electoral legislation only required preference distribution until one party obtained 50% or more; this happened on the third preference distribution. However, Malcolm Mackerras estimated a two-party count for the election.
^Black, David; Prescott, Valerie (1997). Election statistics, Legislative Assembly of Western Australia, 1890–1996. Perth: Parliamentary History Project and Western Australian Electoral Commission. ISBN0-7309-8409-5. p. 245.