Harmon, Paul, author
John Wiley and Sons, 1985
Buku Teks
Editors by Daniel A. De Salvo; Jay Liebowitz
Prentice-Hall, 1990
Buku Teks
Rolston, David W., author
McGraw-Hill, 1988
Buku Teks
Medsker, Larry, author
Macmillan Publishing company, 1994
Buku Teks
Negoita, Constantin Virgil, author
The Benjamin Cumming Pub., 1985
Buku Teks