1. J. Boston ‘Electoral reform in New Zealand: the report of the Royal Commission’, Electoral Studies, 6 (1987) 105–114
2. General Election, 1957, Parliamentary Paper H33; from 1972, Parliamentary Paper E9 (Wellington, 1957ff) and subsequent volumes in the same series
3. B. D. Graham, ‘The Country Party idea in New Zealand politics, 1901–1935’, Studies in a Small Democracy, ed. R. Chapman and K. Sinclair (Auckland: Paul’s Book Arcade for the University of Auckland, 1963) 175–99
4. B.S. Gustafson, Constitutional Changes Since 1870 (Auckland and London: Heineman, 1969)
5. B.S. Gustafson, Labour’s Path to Independence: the Origins and Establishment of the New Zealand Labour Party (Auckland: Auckland University Press, 1980)