Nickel, M. L. (1975). Steps to service: A handbook of procedures for the school library media center. American Library Association.
Cita Chicago (17th ed.)Nickel, Mildred L. Steps to Service: A Handbook of Procedures for the School Library Media Center. Chicago: American Library Association, 1975.
Cita MLA (9th ed.)Nickel, Mildred L. Steps to Service: A Handbook of Procedures for the School Library Media Center. American Library Association, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.