Long, David
Scribner, 1997
Buku Teks
Guterson, David
Vintage Books , 1995
Buku Teks
Cambridge University Press, 1994
eBooks
Elly Susanty Rachman, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2001
UI - Tesis Membership
Long, David E., editor
Westview Press, 1985
Buku Teks