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Wszystkie 2 wydania Robert Burke Johnson na Paperbac... Book
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![Cover for Robert Burke Johnson · Educational Research: Quantitative, Qualitative, and Mixed Approaches (Paperback Book) [8 Revised edition] (2025)](https://imusic.b-cdn.net/images/item/original/818/9781071965818.jpg?robert-burke-johnson-2025-educational-research-quantitative-qualitative-and-mixed-approaches-paperback-book&class=scaled&v=1719535754)
![Cover for Robert Burke Johnson · Educational Research - International Student Edition: Quantitative, Qualitative, and Mixed Approaches (Paperback Book) [7 Revised edition] (2019)](https://imusic.b-cdn.net/images/item/original/174/9781544372174.jpg?robert-burke-johnson-2019-educational-research-international-student-edition-quantitative-qualitative-and-mixed-approaches-paperback-book&class=scaled&v=1571262233)