Dobelstein, Andrew W.
Wadsworth, 2003
Buku Teks
Pigou, Arthur Cecil, 1877-1959
Macmillan, 1950
Buku Teks
Baumol, William J.
Mass. Harvard University Press, 1952
Buku Teks
Friedlander, Walter A.
Prentice Hall of India, 1982
Buku Teks
Australian council of social service, 0
Buku Teks