McCracken, J. R. (1992). A Survey of Public Library Certification Requirements in the National Library Community.
Citazione stile Chigago Style (17a edizione)McCracken, John R. A Survey of Public Library Certification Requirements in the National Library Community. 1992.
Citatione MLA (9a ed.)McCracken, John R. A Survey of Public Library Certification Requirements in the National Library Community. 1992.
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