Olds, Anita Rui, author
McGraw-Hill, 2000
Buku Teks
Olds, Anita Rui, author
McGraw-Hill, 2001
Buku Referensi
Edited by Norbert Pachler; Ana Redondo
Routledge, 2007
Buku Teks
Herman, Shirley Yvone
Four Winds, 1969
Buku Teks
The Unesco Press, 1975
Buku Teks