Nicholson, Walter, author
The Dryden Press, 1979
Buku Teks
Varian, Hal R.
W.W. Norton, 1990
Buku Teks
Hyman, David N.
Times Mirror/Mosby College, 1986
Buku Teks
Pindyck, Robert S., author
Pearson, 2009
Buku Teks
Katz, Michael L., author
Irwin McGraw-Hill, 1998
Buku Teks