Färber, B. (1980). Psychologische Analysen des Kopfrechnens und ihre empirische Validierung.
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Citação norma Chicago
Färber, Berthold. Psychologische Analysen Des Kopfrechnens Und Ihre Empirische Validierung. Regensburg, 1980.
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Citação norma MLA
Färber, Berthold. Psychologische Analysen Des Kopfrechnens Und Ihre Empirische Validierung. 1980.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.