Lane, Edward William, author
Frederick Ungar Publishing, 1956
Buku Referensi
Graver, B.D.
Walton Street , 1987
Buku Teks
Hill, L.A.
Oxford University Press, 1982
Buku Teks
Tomasowa, Francien Herlen, author
Universitas Brawijaya , 2005
Buku Teks
Scobie, Janet I.
George Allen and Unwin, 1959
Buku Teks