Pollard, A.F.
Longman , 1951
Buku Teks SO
Hackett, Francis
Bantam Books, 1958
Buku Teks SO
Wilson, John Dover, 1881-1959
Cambridge University Press, 1954
Buku Teks SO
Read, Donald
Longman, 1994
Buku Teks SO
King, Horace Maybray
John Murray, 1953
Buku Teks