Aaker, David A., author
John Wiley & Sons, 2000
Buku Teks
Crisp, Richard D., author
McGraw-Hill, 1957
Buku Teks
Kinnear, Thomas C., 1943-, author
McGraw-Hill, 1996
Buku Teks
Kinnear, Thomas C., 1943-, author
McGraw-Hill, 1983
Buku Teks
Lorie, James H., author
NMcGraw-Hill , 1951
Buku Teks