Block, Zenas, author
Harvard Business School Press, 1993
Buku Teks
Aulet, Bill, 1958-, author
John Wiley & Sons, 2013
Buku Teks
Henderson, Carter F., author
Holt, Rinehart and Winston, 1985
Buku Teks
Hosmer, La Rue
McGraw-Hill , 1985
Buku Teks
Holt, David H., author
Prentice-Hall, 1992
Buku Teks