Tomasowa, Francien Herlen
Universitas Brawijaya , 2005
Buku Teks
Eckersley, C. E. (Charles Ewart), 1892-1967
Longmans, Green and Co., 1953
Buku Referensi
Puchta, Herbert
Cambridge University Press, 2010
Multimedia
Puchta, Herbert
Cambridge University Press, 2010
Multimedia
McCrum, Robert
Faber and Faber , 1992
Buku Teks