Kershaw, Baz
Routledge, 1992
Buku Teks
Simpson, Leanne, 1971-
University of Minnesota Press, 2017
Buku Teks
Ilbert, Courtenay
Oxford University Press , 1947
Buku Teks
Williamson, James A.
Macmilan and Co,, 1950
Buku Teks
Winkowski, Fred
Pavilion,, 1994
Buku Teks