Rosenberg, Jerry M., author
John Wiley & Sons, 1987
Buku Referensi
Routledge, 1997
Buku Referensi
Gouzali Saydam, author
Djambatan, 1992
Buku Referensi
Corbell, Jean-Claude, author
Bhuana Ilmu Populer, 2007
Buku Referensi
Schwartz, Robert J., author
Crowell , 1955
Buku Referensi