Cohen, J.M. (John Michael), 1903-1989, author
Allen Lane, 1980
Buku Referensi
Bloomsbury, 1990
Buku Referensi
Bartlett, John, author
Routledge and Kegan Paul, 1955
Buku Referensi
Fleming H Revel Co., 1947
Buku Teks
compiled and edited by Bill Wannan
Macmillan, 1974
Buku Referensi