Skrob, Robert, author
Entrepeneur Press, 2013
Buku Teks
Linsenman, Ciree, author
Ep. Entrepreneur Press, 2011
Buku Teks
Charlene Davis
Entrepreneur Press, 2012
Buku Teks
Entrepreneur Press, Ciree Linsenman
Entepreneur Press, 2011
Buku Teks
Johnson, Luke, author
Penguin book, 2013
Buku Teks