Koepke, C. A. (1949). Plan production control (2nd. ed.). John Wiley and Sons.
Cita Chicago Style (17a ed.)Koepke, Charles A. Plan Production Control. 2nd. ed. New York: John Wiley and Sons, 1949.
Cita MLA (9a ed.)Koepke, Charles A. Plan Production Control. 2nd. ed. John Wiley and Sons, 1949.
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