Pigou, A.C. (Arthur Cecil), 1877-1959, author
Macmillan, 1956
Buku Teks
Torr, Christopher, author
Westview Press, 1988
Buku Teks
Dillard, Dudley D., author
Prentice-Hall, 1949
Buku Teks
Young, Warren C., author
Westview, 1987
Buku Teks
Wasik, John F., author
Mc-Graw-Hill, 2014
Buku Teks