Goss, David
Taylor and Francis, 1995
Buku Teks
McGuire, Joseph W.
McGraw-Hill, 1963
Buku Teks
Epstein, Lita
John Wiley & Sons, 2009
Buku Teks
Hancock, William A.
McGraw-Hill, 1982
Buku Teks
by Curtis E. Tate Jr. ... [and others]
Business Publication, 1982
Buku Teks