Lowenfeld, Andreas F.
Buku Teks
Pinsler, Jeffrey, author
LexisNexis , 2010
Buku Teks
Mayss, Abla, author
Ashgate, 1998
Buku Referensi
Gary Joseph, Georgina Carson, Phyllis Brodkin, William Abbott, Geuffrey Wells
Carswell, 2011
Buku Referensi
Haydock, Roger S, author
West, 2011
Buku Teks