Carrithers, Wallace M., author
Charles E. Merrill, 1967
Buku Teks
Deegan, Marilyn, author
Library Association , 2002
Buku Teks
Artikel Jurnal
Heany, Donald F., author
Ronald Press, 1968
Buku Teks
Greenwood, William T., author
South-Western, 1969
Buku Teks