Benewick, Anne J.
Peter Peregrinus, 1974
Buku Referensi
Paris : The United Nations Educational
Majalah, Jurnal, Buletin
Shuman, Bruce A., author
Libraries Unlimited, 2001
Buku Teks
National Library of Australia, 1993
Majalah, Jurnal, Buletin
Artikel Jurnal