Fry, Peter Somerset
Routledge , 2001
Buku Teks
Garland Publishing, Inc, 1996
Buku Teks
Taylor, Alice
Oxford University Press, 2016
eBooks
Mackintosh, Chaerles Rennie
The Foulis Press, 1995
Buku Teks
Tait, Alan A.
Edinburgh University Press, 1980
Buku Teks