Smith, P. G. (1991). Developing products in half the time. New York: Van Nostrand Reinhold.
Παραπομπή Chicago StyleSmith, Preston G. Developing Products in Half the Time. New York: Van Nostrand Reinhold, 1991.
Παραπομπή MLASmith, Preston G. Developing Products in Half the Time. New York: Van Nostrand Reinhold, 1991.
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