Churchill Livingstone, 1989
Buku Referensi
Gibilisco, Stan, 1953-, author
Tab Books, 1994
Buku Referensi
text edited by J. Coulson, C.T. Carr, Lucy Hutchinson and Dorohy Eagle; illus. edited by Helen Mary Petter
Clarendon Press, 1962
Buku Referensi
Winson, Nicola V., author
Elsevier, 2005
Buku Teks
Winson, Nicola V., author
Elsevier, 2005
Buku Referensi