MacIver, Robert M.
Atherton Press, 1969
Buku Teks SO
MacIver, Robert M.
Atherton Press, 1969
Buku Teks SO
edited by Stephen White, Judy Batt and Paul G. Lewiss
Macmillan, 1993
Buku Teks SO
Daltrop, Anne
Longman, 1982
Buku Teks SO
Oxford University Press, 2003
Buku Teks SO