Bonavio, Judy
Passport Books, 1986
Buku Teks
Steinhauer, Hein, author
Faculty of Humanities University of Indonesia, 2011
Artikel Jurnal
Chang Liu
New York : Routledge , 2007
Buku Teks
Farrell, Jane, author
J.B. Lippincott, 1986
Buku Teks
Charle, Suzanne, author
Collins, 1990
Buku Referensi