Cassandra Clare (2012). “Cassandra Clare: The Mortal Instruments Series (5 books): City of Bones; City of Ashes; City of Glass; City of Fallen Angels, City of Lost Souls”, p.30, Simon and Schuster
"Author Interview: Cassandra Clare on City of Bones (Book One, The Mortal Instruments)". Interview with Cynthia Leitich Smith, cynthialeitichsmith.blogspot.com. March 8, 2008.