Schenk, G. K. (1954). County ang regional library development. Chiacago: American Library Association.
Chicago-tyylinen lähdeviittausSchenk, Gretchen Knief. County Ang Regional Library Development. Chiacago: American Library Association, 1954.
MLA-viiteSchenk, Gretchen Knief. County Ang Regional Library Development. Chiacago: American Library Association, 1954.
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