edited by Geoffrey A. Hosking and George F. Cushing
Macmillan Press, 1989
Buku Teks
Emerald Publishing Limited, 2019
eBooks
edited by Klaus Gottstein
Campus Verlag , 1992
Buku Teks
Zamroni, author
2005
Artikel Jurnal
Droz, Jacques, author
Harper & Row, 1967
Buku Teks