Rockart, John Fralick, author
McGraw-Hill, 1975
Buku Teks
edited by Heather Fry, Steve Ketteridge and Stephanie Marshall
Routledge, 2009
Buku Referensi
Brown, George, author
Routledge, 1997
Buku Teks
McAvinia, Claire, author
Chandos Publishing, an imprint of Elsevie, 2016
Buku Teks
Ramsden, Paul
Routledge , 1992
Buku Teks