Brown, George
Routledge, 1997
Buku Teks
Rockart, John Fralick
McGraw-Hill, 1975
Buku Teks
edited by Michael Byram
Multilingual Matters, 1994
Buku Teks SO
edited by Heather Fry, Steve Ketteridge and Stephanie Marshall
Routledge, 2009
Buku Referensi
Arends, Richard I., 1990-
McGraw-Hill, 2012
Buku Teks