Laurel Saville, Steve Gordhan, Jodhua Berger, Sarch Dougher, editor
Page one publishing pte ltd, 2011
Buku Referensi
Simmons, Christopher, 1973-, author
Rockport Publishers, 2006
Multimedia
White, Edward T., author
Intermedia, 1985
Buku Teks
Page One, 2011
Buku Referensi
Rockport publishers, Inc.;, 2011
Buku Referensi