Fisher, John H. 1977. Chancery and the Emergence of Standard Written English in the Fifteenth Century. Speculum52:870-899.
3.
McMahon, April. 1994. Understanding Language Change. Cambridge, UK: Cambridge University Press.
4.
Revised in Middle English Dialectology: Essays on Some Principles and Problems, edited by M. Laing, 64-80. Aberdeen, UK: Aberdeen University Press, 1989.
