edited by Keith Hancock
Cambridge University Press, 1989
Buku Teks SO
Kartomi, Margaret J.
Australian National University Press, 1973
Buku Teks SO
edited by S. Encel ... [et.al.]
Longman Cheshire, 1984
Buku Teks
Bennett, Raymond
M.M & B. Book, 1989
Buku Teks
Stephen Johnston... [et al.]
Harper Educational, 1995
Buku Teks