edited by R.M. Whiteside
Graham and Trotman, 1988
Buku Referensi
edited by R.M. Whiteside
Graham and Trotman, 1988
Buku Referensi
Haslam, S.M. [Sylvia Mary], 1934-
Cambridge University Press, 2014
Buku Teks
by Samuel H. Beer ... [et al.]
Random House, 1965
Buku Teks SO
Williams, E.N.
Penguin Books, 1970
Buku Teks