Harper, Laurel
Chronicle Books, 1999
Buku Referensi
Marcus, George H.
Prestel, 1995
Buku Teks SO
Meggs, Philip B.
John Wiley & Sons, 1998
Buku Teks
Gomez-Palacio, Bryony
Page one publishing pte ltd, 2009
Buku Referensi
Dean, Corinna
Rockport Publishers, 2000.
Buku Teks SO