Hobday, Peter, author
Priory Press, 1976
Buku Teks
Sharpe, James, author
Routledge, 2019
Buku Teks
Brooke, Jocelyn
Longman, 1952
Koleksi Publik
Elizabeth, Keith, author
Chaekwa homkke, 2007
Buku Teks
Griffin, Dustin, author
Cambridge University Press, 2009
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