Meltzer, Allan H.
Cambridge University Press, 1988
Buku Teks
Pigou, A.C. (Arthur Cecil), 1877-1959, author
Macmillan, 1956
Buku Teks
Dillard, Dudley D., author
Prentice-Hall, 1949
Buku Teks
Grant, F.S., author
McGraw-Hill, 1965
Buku Teks
Marmor, Andrei, author
Oxford University Press, 1995
Buku Teks