Burton, Samuel Holroyd
Mastering english language
Macmillan, 1992
 Buku Teks SO
Gray, Loretta S.
Mastering idiomatic english
National Textbook Company, 1999
 Buku Teks SO
Bennie, Michael
Glorier business library : mastering business english
Glorier International, 1999
 Buku Referensi
Sulaiman, Othman bin
Malay for everyone : mastering Malay through English / Othman Sulaiman.
Pelanduk Publications, 1980
 Buku Teks SO
Taylor, Grant
Mastering American English exercises for intermediate and advanced students/ Grant Taylor
Saxon Press, 1956
 Buku Teks SO