Hicks, Lanis L.
Jones & Bartlett Learning, 2014
Buku Teks
Wonderling, David
Open University Press, 2005
Buku Teks
Cooper, Michael H.
John Wiley & Sons, 1975
Buku Teks
Folland, Sherman
Prentice-Hall, 2001
Buku Teks
edited by Andrew M. Jones
Edward Elgar, 2012
Buku Teks