Dahl, Svend, author
Scarecrow Press, 1968
Buku Teks
Weintraub, Max, author
Regents, 1960
Buku Teks
Bland, David, author
Faber and Faber LimIted, 1969
Buku Teks
Dunne, Jemima, author
Dorling Kindersley, 2012
Buku Referensi
contributors, Charles Armstrong-Wilson [and 6 others]
Dorling Kindersley, 2015
Buku Referensi