Artikel Jurnal
Stephenson, Mary Sue
The Scarecrow Press, 1990
Buku Referensi
Hanna, Archibald, 1916-2010, author
Garland Publishing, 1985
Buku Referensi
Nisonger, Thomas E., author
Libraries Unlimited, 1992
Buku Referensi
Harter, H. Leon, author
Ohio: American Sciences Press, 1977
Buku Teks