edited by Eric S. Rabkin
Oxford University Press, 1983
Buku Teks SO
edited by Tony Bennet
Routledge, 1990
Buku Teks SO
Rosenberg, Betty
Libraries Unlimited, 1982
Buku Referensi
Cherland, Meredith Rogers
Taylor and Francis, 1994
Buku Teks SO
Moore F.R.A.S, Patrick
George G Harrap , 1957
Buku Teks SO