Willis, James F., author
North West Publishing, 2002
Buku Teks
Pindyck, Robert S., author
Pearson/Prentice Hall, 2009
Buku Teks
Pindyck, Robert S., author
Pearson, 2009
Buku Teks
Katz, Michael L., author
Irwin McGraw-Hill, 1998
Buku Teks
Pindyck, Robert S., author
Prentice-Hall, 1995
Buku Teks