Kirk-Greene, C. W. E.
Foulsham, 1992
Buku Teks
Bean, C.E.W. (Charles Edwin Woodrow)
Angus and Robertson, 1963
Buku Teks
Black, C.E.
Princeton University press, 1943
Buku Teks
Tindal, C. Richard
Nelson Thomson Learning, 2000
Buku Teks
Edey, Harold C.
Garland Publishing , 1982
Buku Teks