Clarke, Hugh V.
Allen & Unwin, 1990
Buku Teks
Booth, Tim
Routledge, 1998
Buku Teks
Moorehead, Alan
New English Library, 1963
Buku Teks
Mitchell, W. O.
McMilland , 1984
Buku Teks
edited by Wendy Bryant, Jon Fieldhouse, Katrina Bannigan
Churchill Livingstone/Elsevier, 2015
Buku Teks