Baily, Martin Neil
Richard D. Irwin, 1995
Buku Teks SO
Knoop, Todd A.
Blackwell Pub., 2008
Buku Teks SO
Parkin, Michael, 1939-
Prentice-Hall, c1992
Buku Referensi
Morley, Samuel A.
The Dryden Press, 1984
Buku Teks
Robert S. Pindyck; Daniel L. Rubinfeld
Prentice-Hall, 1992
Buku Teks