Gray, Loretta S.
Mastering idiomatic english
National Textbook Company, 1999
 Buku Teks SO
Morrison, L. A.
Conversations in English for foreign students
Central Press, 1956
 Buku Teks
Hava, J.G.
Arabic-English dictionary : for the use of students
Catholic Press , 1951
 Buku Referensi
Sova, Miloš
A practical Czech course for english-speaking students
Státní Pedagogické Nakladatelství, 1962
 Buku Teks SO
Allen, W. Stannard
Living English structure : a practise book for foreign students
Longman, 1974
 Buku Teks SO