Hudson, Kenneth, author
Macmillan, 1977
Buku Referensi
Ricky Ganang, 1951-, author
National department for culture & Arts, 2009
Buku Referensi
Wortabet, John, author
Frederick Ungar Publishing, 1954
Buku Referensi
Scotland, 1999
Buku Referensi
Diamond, 2001
Buku Referensi