Jenny, Susan
Hoong Fatt Press, 1972
Buku Teks
Tomasowa, Francien Herlen, author
Universitas Brawijaya , 2005
Buku Teks
Scobie, Janet I.
George Allen and Unwin, 1959
Buku Teks
Doff, Adrian, author
Cambridge University Press, 2011
Multimedia
Doff, Adrian, author
Cambridge University Press, 2011
Multimedia