Brittain, Herbert, Sir
George Allen and Unwin, 1959
Buku Teks
The British Council, 1959
Buku Teks
Kogan Page , 1986
Buku Teks
Saleh, Zaki
Al-Ma`aref Press, 1966
Buku Teks
Ricklefs, M.C. (Merle Calvin), 1943-, author
Oxford University Press, 1977
Buku Referensi