Lillard, P. P. (1972). Montessori, a modern approach. Schocken Books.
Chicago-čujuhus (17. p.)Lillard, Paula Polk. Montessori, a Modern Approach. New York: Schocken Books, 1972.
MLA-čujuhus (9. p.)Lillard, Paula Polk. Montessori, a Modern Approach. Schocken Books, 1972.
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