Frank, Frederick S., author
Garland Publishing, 1987
Buku Referensi
Karl, Frederick R., author
Thames & Hudson, 1970
Buku Teks
Allen, Walter
E.P. Dutton, 1954
Buku Teks
Allen, Walter
Penguin Books, 1954
Buku Teks
Botting, Fred, author
Routledge , 1996
Buku Teks