National Education Association of the United States. Department of Elementary-Kindergarten-Nursery Education. (1968). Kindergarten education. s. n.
Citace podle Chicago (17th ed.)National Education Association of the United States. Department of Elementary-Kindergarten-Nursery Education. Kindergarten Education. [Washington, D. C: s. n, 1968.
Citace podle MLA (9th ed.)National Education Association of the United States. Department of Elementary-Kindergarten-Nursery Education. Kindergarten Education. s. n, 1968.
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