Downs, Anthony, author
Harper and Row, 1975
Buku Teks
Starr, Ross M., author
Edward elgar, 2012
Buku Teks
Intriligator, Michael D., author
Prentice-Hall, 1971
Buku Teks
Intriligator, Michael D., author
Society for Industrial and Applied Mathematics, 2002
eBooks
Quirk, James P.
McGraw-Hill, 1968
Buku Teks