Voiles, Price R.
Business English essentials
Glencoe, 1993
 Buku Teks
Tomasowa, Francien Herlen
English for non-english departements
Universitas Brawijaya , 2005
 Buku Teks SO
Eastwood, John
English for travel
Oxford University Press, 1994
 Buku Teks
Tomasowa, Francien Herlen
English for management
Universitas Brawijaya, 2005
 Buku Teks SO
Scobie, Janet I.
English for the certificate
George Allen and Unwin, 1959
 Buku Teks SO