Tang, Stephen, author
Piatkus, 1995
Buku Referensi
Skidmore-Roth, Linda, author
Mosby , 2010
Buku Teks
Ody, Penelope
Dorling Kindersley, 1995
Buku Referensi
Griggs, Barbara, author
Pan Books, 1995
Buku Referensi
Ody, Penelope, author
Dorling Kindersley, 1993
Buku Referensi