Eco, Umberto, author
Harcourt Brace Jovanovich, 1983
Buku Teks
edited by Joan Broadhurst Dixon and Eric J. Cassidy
Routledge, 1998
Buku Teks
Artikel Jurnal
Garland Publishing, Inc., 1994
Buku Referensi
Parents' Magazine's Cultural Institute, 1965
Buku Referensi