Samsiah Abdul Hamid
Mastering English for employment
Cengage Learning, 2012
 Buku Teks
Gray, Loretta S.
Mastering idiomatic english
National Textbook Company, 1999
 Buku Teks SO
Sambrook, G.A.
English language
Longmans, Green, 1947
 Buku Teks
Bennie, Michael
Glorier business library : mastering business english
Glorier International, 1999
 Buku Referensi
English this way English Language Services.
London Collier-Macmillan 1965,
 Buku Teks