Presner, Lewis A., author
John Wiley & Sons, 1991
Buku Referensi
Mason, R. Hal (Robert Hal), 1929-, author
John Wiley & Sons, 1981
Buku Teks
Ball, Donald A., author
Business Publications, 1985
Buku Teks
Vernon, Raymond, author
Prentice-Hall, 1981
Buku Teks
Vernon, Raymond, author
Prentice-Hall, 1972
Buku Teks