Innes, Hammond, 1913-
Scandinavia
Time Inc., 1963
Buku Teks SO
Gough, Ian
The political economy of the welfare state
Macmillan, 1992
Buku Teks SO
Boumol, William J.
Welfare economics and the theory of the state
Harvard University Press, 1952
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Heckscher, Gunnar
The welfare state and beyond
Buku Teks SO
Titmuss, Richard M.
Essays on the welfare state
George Allen and Unwin, 1959
Buku Teks