Turner, Ian
Hale & Iremonger, 1979
Buku Teks
Nadel, George
Cheshire, 1957
Buku Teks
Crawford, R.M.
Hutchinson's University Library, 1955
Buku Teks
Crawford, R.M.
Hutchinson University Library, 1952.
Buku Teks
MacKinnon, Kathy
Gramedia Pustaka Utama, 1992
Buku Teks