Schlemmer, P., Schlemmer, D., & Pernu, C. (1999). Challenging projects for creative minds: 12 self-directed enrichment projects that develop and showcase student ability for grades 1 to 5. Free Spirit Pub.
Παραπομπή σε μορφή Chicago (17η εκδ.)Schlemmer, Phil, Dori Schlemmer, και Caryn Pernu. Challenging Projects for Creative Minds: 12 Self-directed Enrichment Projects That Develop and Showcase Student Ability for Grades 1 to 5. Minneapolis, Minn: Free Spirit Pub, 1999.
Παραπομπή σε μορφή MLA (9th εκδ.)Schlemmer, Phil, et al. Challenging Projects for Creative Minds: 12 Self-directed Enrichment Projects That Develop and Showcase Student Ability for Grades 1 to 5. Free Spirit Pub, 1999.
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