Lorton, M. B. (1972). Workjobs; activity-centered learning for early childhood education. Addison-Wesley Pub.
Chicago-viite (17. p.)Lorton, Mary Baratta. Workjobs; Activity-centered Learning for Early Childhood Education. Menlo Park, Calif: Addison-Wesley Pub, 1972.
MLA-viite (9. p.)Lorton, Mary Baratta. Workjobs; Activity-centered Learning for Early Childhood Education. Addison-Wesley Pub, 1972.
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