Kochanek, Richard F., author
Harcourt Brace Jovanovich, 1990
Buku Teks
Arnold, John, author
Prentice-Hall, 1985
Buku Teks
Helt Rinehart and winston, 1970
Buku Teks
Deegan, Craig, author
McGraw-Hill, 2009
Buku Teks
Pattillo, James W., author
Lousiana State University Press , 1965
Buku Teks