Sinaga, Tuntun
Universitas Indonesia, 1998
UI - Tesis (Membership)
Freiman, Marcelle
Island, 1951
Buku Teks
Pullman, Philip
Gramedia Pustaka Utama, 2007
Buku Teks
Francis, Clare
Pan Books, 1997
Buku Teks
Sargent, Sarah
Four Winds Press, 1984
Buku Teks