edited by Davis S. Miall
Clarendon Press, 1990
Buku Teks SO
edited by Julian Hilton
Macmillan, 1993
Buku Teks
editor, Lawrence R. Frey
Sage, 2002
Buku Teks
Packer, Herbert L.
McGraw-Hill, 1973
Buku Teks
edited by Ernest R. House
Academic Press, 1986
Buku Teks