edited by Betty Jo Irvine
Libraries Unlimited, 1991
Buku Teks
Viaux, Jacqueline
Garland Publishing, 1985
Buku Referensi
Bradbury, Phil, author
Colo Libraries Unlimited , 1989
Buku Teks
American Library Association, 1970
Buku Referensi
Hammer, Bjarne, author
Roads, 2014
Buku Referensi