Brewster, Lawrence G., author
St. Martin`s Press, 1982
Buku Teks
Brewster, Lawrence G., author
Thomson wadsworth, 2004
Buku Teks
Black, James A., author
John Wiley & Sons, 1976
Buku Teks
edited by James F. Short
Sage, 1986
Buku Teks
Leftwich, Richard H., author
Business Publications, 1982
Buku Teks