Leigh, Ray
Longman, 1974
Buku Teks
Sutikno Bronto, author
STTN, 2001
Buku Teks
introduction by Bruce A. Bolt
W.H. Freeman, 1980
Buku Teks
Sieh, Kerry
W.H. Freeman and Company , 1999
Buku Teks
Sutherland, Lin, author
University of New South Wales Press, 1995
Buku Referensi