Black, C.E., author
Alfred A. Knopf, 1966
Buku Teks
Birkha'user Verlag, 1995
Buku Teks
Amin, Samir, author
Zed Books, 2014
Buku Teks
edited by Alexander Baltzly, A. William Salomone
Appleton-Century-Crofts, 1950
Buku Teks
Meller, Helen, author
John Wiley & Sons, 2001
Buku Teks