|Election||Premier at election||Premier's party||Premier after election||Premier's party|
|NSW 25 October 1930||Thomas Rainsford Bavin||Nationalist Party||John Thomas Lang||Australian Labor Party|
|NSW 8 October 1927||John Thomas Lang||Australian Labor Party||Thomas Rainsford Bavin||Nationalist Party|
|NSW 30 May 1925||George Warburton Fuller||Nationalist - Progressive Coalition||John Thomas Lang||Australian Labor Party|
Loss of election (Fuller): Beginning of Lang's first period in office; see Michael Hogan, '1925', in Michael Hogan and David Clune (editors), The People's Choice: Electoral Politics in 20th Century New South Wales, vol. 1 (1901 to 1927), pp. 269-324, (Sydney: Parliament of New South Wales and University of Sydney, 2001, ISBN 0909907390).
Loss of election (Lang): See Kevin Cosgrove, '1927', in Michael Hogan and David Clune (editors), The People's Choice: Electoral Politics in 20th Century New South Wales, vol. 1 (1901 to 1927), pp. 325-370, (Sydney: Parliament of New South Wales and University of Sydney, 2001, ISBN 0909907390). On the reconstitution of Lang's ministry before the October 1927 election, see also Hughes and Graham, p. 71, (see 'Sources', below).
References: For an analysis of the role of Premier in New South Wales, see David Clune and Ken Turner, 'Introduction: The Changing Role of the Premier in the 20th Century', pp. 1-14, in Clune and Turner vol. 2 (see, 'Sources', below).
For a survey of Lang's political career, see Michael Hogan, 'John Thomas Lang', in Clune and Turner, vol. 2, pp. 179-199 (see 'Sources', below), and Bede Nairn, 'Lang, John Thomas (1876-1975)', in Bede Nairn and Geoffrey Searle (general editors), Australian Dictionary of Biography, vol. 9, pp. 661-666, (Melbourne: Melbourne University Press, 1983, ISBN 0522842739); see also Heather Radi and Peter Spearritt (editors), Jack Lang, (Neutral Bay, NSW: Hale & Iremonger, 1977, ISBN 0908094019).
David Clune and Ken Turner (editors), The Premiers of New South Wales, vol. 2, (1901-2005), (Sydney: Federation Press, 2006, ISBN 186287551); Colin A Hughes and B D Graham, A Handbook of Australian Government and Politics 1890-1964, pp. 57-85, (Canberra: Australian National University Press, 1968, SBN 708102700); New South Wales, Parliament, The New South Wales Parliamentary Record: Legislative Council and Legislative Assembly, 1824-1999, vol. VI, pp. 246-308, (Sydney: Parliament of New South Wales, 1999). In consulting these sources, note the difference between ministries and periods in office.