Dunne, Jemima
Dorling Kindersley, 2012
Buku Referensi
Nicola Hodgson, Chris Stone, Alison Sturgeon, David Summers, editor
Dorling Kindersley, 2013
Buku Referensi
edited by Deborah Cherry
Blackwell, 2005
Buku Teks
Paytress, Mark
Parragon, 2011
Buku Referensi
Gomez-Palacio, Bryony
Page one publishing pte ltd, 2009
Buku Referensi