Springhouse , 1999
Buku Teks
Dorling Kondsley, 1992
Buku Referensi
Briggs, Leslie J.
Englewood Cliffs , 1981
Buku Teks
Queensland University of Technology, 1998
Buku Referensi
edited bTheo Van Leeuwen, Carey Jewitt
Sage Publications, 2001
Buku Referensi