Artikel Jurnal
Compiled and edited by Dorothy Nyren Curley, Maurice Kramer, Elaine Fialka Kramer
Continuum, 1989
Buku Referensi
Abel, Darrel, author
Barron's Educational Series, 1963
Buku Referensi
Duke University Press,
Majalah, Jurnal, Buletin
United State Information Agency, 1994
Buku Teks