Palmer, Alan, author
Penguin Books , 1987
Buku Referensi
Cohen, J.M. (John Michael), 1903-1989, author
Viking, 1993
Buku Referensi
Teed, Peter, author
Oxford University Press , 1992
Buku Referensi
Black, C.E., author
Alfred A. Knopf, 1961
Buku Teks
Black, C.E., author
Alfred A. Knopf, 1966
Buku Teks