Matthew Tinkcom, Amy Villarejo
Routledge, 2001
Buku Teks
Hayward, Susan, author
Routledge , 2006
Buku Referensi
Hayward, Susan, author
Routledge, 2006
Buku Teks
Departemen Pendidikan dan Kebudayaan
Jakarta Ministry of Education and Culture, Republic of Indonesia, 2012
Buku Teks
London : Routledge
Majalah, Jurnal, Buletin