Davies, C. (1871). Intellectual arithmetic: Being an analysis of the science of numbers, with special reference to mental training and development. A. S. Barnes.
Chicago-referens (17:e uppl.)Davies, Charles. Intellectual Arithmetic: Being an Analysis of the Science of Numbers, with Special Reference to Mental Training and Development. New York: A. S. Barnes, 1871.
MLA-referens (8:e uppl.)Davies, Charles. Intellectual Arithmetic: Being an Analysis of the Science of Numbers, with Special Reference to Mental Training and Development. A. S. Barnes, 1871.
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