Vernon, Raymond, author
Prentice-Hall, 1996
Buku Teks
Levi, Maurice D., 1945-, author
McGraw-Hill, 1990
Buku Teks
Zwick, Jack
SBA, 1981
Buku Teks
edited by Donald R. Lessar
John Wiley & Sons, 1985
Buku Teks
Elashmawi, Farid, author
Gramedia Pustaka Utama, 1996
Buku Teks