Hardy, Frank
Gold Star Publication, 1971
Buku Teks
Palmer, Vance
Longman Cheshire, 1981
Buku Teks
Astley, Thea
Angus and Robertson, 1960
Buku Teks
Hardy, Frank
Hawthorn, star Publications, 1971
Buku Teks
Moorhouse, Frank
Angus and Robertson, 1973
Buku Teks