Darling, Diana
Archipelago Press, 1999
Buku Referensi
illustrations by A. Kasim Abas ; text by Peter Kedit
Editions Didier Millet, 2005
Buku Referensi
Boundy, Albert W.
McGraw-Hill, 2012
Buku Teks SO
Shaw, K.E.
University Education Press, 1973
Buku Teks SO
Kamsiah M. Bostock
Kamsiah Binti Mohammad, 2011
Buku Teks SO