McGowan, Tony
Allen & Unwin, 1995
Buku Teks
Kocan, Peter
Angus & Robertson, 1988
Buku Teks
Koch, Christopher J.
Minerva, 1996
Buku Teks
Koch, Christopher J.
Agus and Robertson Publishers, 1986
Buku Teks
Argyle, Barry.
Clarendon Press,, 1972
Buku Teks