Hartlein, M. L. Construction and evaluation of a test to measure elementary mathematical understandings. Michigan University Microfilms.
Čikaški stil citiranja (17. izdanje)Hartlein, Marion Louise. Construction and Evaluation of a Test to Measure Elementary Mathematical Understandings. Ann Arbor: Michigan University Microfilms.
MLA način citiranja (9. izdanje)Hartlein, Marion Louise. Construction and Evaluation of a Test to Measure Elementary Mathematical Understandings. Michigan University Microfilms.
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