Iowa. State Board of Educational Examiners. Library manual for the public schools of Iowa. Prepared by State Board of Educational Examiners.
Čikaški stil citiranja (17. izdanje)Iowa. State Board of Educational Examiners. Library Manual for the Public Schools of Iowa. Des Moines, Iowa: Prepared by State Board of Educational Examiners.
MLA način citiranja (8. izdanje)Iowa. State Board of Educational Examiners. Library Manual for the Public Schools of Iowa. Prepared by State Board of Educational Examiners.
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