Thompson, Kenneth W., author
Lousiana State University Press, 1980
Buku Teks
Olson, William Clinton, author
Prentice Hall International, 1994
Buku Teks
Lewis, William Arthur, 1915-, author
Princeton University Press, 1978
Buku Teks
Masson, VeNeta
Springer Publ ., 1981
Buku Teks
Nasr, Seyyed Hossein, author
Routledge, 2008
Buku Teks