Birkha'user Verlag, 1995
Buku Teks
Amin, Samir, author
Zed Books, 2014
Buku Teks
Meller, Helen, author
John Wiley & Sons, 2001
Buku Teks
compiled by Jonathan French Scott and Alexander Baltzly
F.S. Crofts & Co., 1930
Buku Teks
Stromberg, Roland D.
Appleton-Century-Crofts, 1968
Buku Teks