Index Book, sl., 2011
Buku Referensi
New York Dava Kan 1998,
Buku Referensi
Donnelly, Daniel, author
Page One Publishing, 2011
Buku Referensi
Rockport publishers, Inc., 2008
Buku Referensi
edited by Rachel Hewes, Allison Hodges
Rockport, 2012
Buku Referensi