Hughes, G. David, author
Addison-Wesley, 1978
Buku Teks
Ahuja, Hira N., author
John Wiley & Sons, 1994
Buku Teks
Rakos, John J., 1946-, author
Prentice-Hall, 1990
Buku Teks
Buell, Victor P., author
McGraw-Hill, 1984
Buku Teks
edited by H. Igor Ansoff
John Wiley & Sons, 1976
Buku Teks