Walter, V. A. (1992). Output measures for public library service to children: A manual of standardized procedures ; part of the public library development program. American Library Association.
Chicago-Zitierstil (17. Ausg.)Walter, Virginia A. Output Measures for Public Library Service to Children: A Manual of Standardized Procedures ; Part of the Public Library Development Program. Chicago, Ill. u.a: American Library Association, 1992.
MLA-Zitierstil (9. Ausg.)Walter, Virginia A. Output Measures for Public Library Service to Children: A Manual of Standardized Procedures ; Part of the Public Library Development Program. American Library Association, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.