Swift, Jonathan
Rinehart and Winston , 1959
Buku Teks
Linda Martina
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2007
UI - Skripsi Membership
Richardson, Joanna
The British Council by Longmans, Green, 1960
Buku Teks
essay by Dave Hickey, Peter Plagens
Hudson Hills Press, 1982
Buku Referensi
Walia, Shelley
Jendela, 2003
Buku Teks