Aves, Melanie, author
Rockport, 1999
Buku Teks
A Ward Lock Book, 1997
Buku Referensi
Geddes-Brown, Leslie, author
Page One, 2000
Buku Referensi
De Chiara, Joseph, 1929-, author
McGraw-Hill International Edition, 1991
Buku Referensi
Sorrell, Katherine, author
Chronicle Books, 2000
Buku Teks