HOFFMAN, K. (1982). Shop math: National machine tool builders' association. John Wiley and Sons.
Cita Chicago (17th ed.)HOFFMAN, K.E. Shop Math: National Machine Tool Builders' Association. New York: John Wiley and Sons, 1982.
Cita MLA (9th ed.)HOFFMAN, K.E. Shop Math: National Machine Tool Builders' Association. John Wiley and Sons, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.