edited by Michael Gorman, Paul W. Winkler
American Library Association, 1978
Buku Referensi
Fleischer, Eugene, author
Neal-Schuman Publishers, Inc. , 1980
Buku Teks
American Library Association, 1988
Buku Referensi
American Library Association, 1984
Buku Referensi
Maxwell, Robert L., author
American Library Association, 2004
Buku Referensi