Scaddan, Brian, author
Erlangga, 2004
Buku Teks
Ceranic, Helena, author
Erlangga , 2011
Buku Teks
Siviter, Bethann
Bailliere Tindall, 2013
Buku Referensi
Hall, Fred, author
Butterworth-Heinemann, 2003
Buku Teks
Muir, Robert, author
Henry Frowde, Hodder & Stoughton, 1921
Buku Teks