Pretzer, W. S. (2001). Working at inventing: Thomas A. Edison and the Menlo Park Experience. Baltimore, MD.: The Johns Hopkins University Press.
Παραπομπή Chicago StylePretzer, William S. Working At Inventing: Thomas A. Edison and the Menlo Park Experience. Baltimore, MD.: The Johns Hopkins University Press, 2001.
Παραπομπή MLAPretzer, William S. Working At Inventing: Thomas A. Edison and the Menlo Park Experience. Baltimore, MD.: The Johns Hopkins University Press, 2001.
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