Boockholdt, James L., author
Irwin, 1996
Buku Teks
Boockholdt, James L., author
McGraw-Hill, 1999
Buku Teks
Clark, James Joseph, 1957, author
Kluwer, 1990
Buku Teks
edited by Robert Goldberg and Harold Lorin
John Wiley & Sons, 1982
Buku Teks
Spencer, Donald D., author
Charles E. Merrill, 1982
Buku Teks