edited by Michael F. Allen
Chapman and Hall, 1992
Buku Teks
Scott, William G., compiler
Homewood,Ill. Irwin 1967,
Buku Teks
Griffin, Ricky W.
Cengage Learning, 2014
Buku Teks
Levine, Joanne
Pearson, 2013
Buku Teks
Shafer, Scott M.
John Wiley & Sons, 1998
Buku Teks