edited by Robert M. Maclean
[Publisher not identified], [Date of publication not identified]
Buku Teks SO
edited by Julian Lovelock
Macmillan, 1983
Buku Teks SO
edited by D.J. Palmer
Macmillan, 1991
Buku Teks SO
edited by Priscilla Martin
Macmillan, 1983
Buku Teks SO
edited by A.E. Dyson
Macmillan, 1969
Buku Teks SO