edited by John L. Bradley and Martin Stevens
Rinehart and Winston, 1968
Buku Teks
Weston, Martin
Oxford, 1991
Buku Teks
Nelson, Andrew Nathaniel, author
Charles E . Tuttle, 1966 ; 1986
Buku Referensi
Weston, Martin
Berg Publishers, 1993
Buku Teks
West, Michael
Longmans, Green and Co., 1951
Buku Teks