Johnston, R. (1997). Cases in operations management (2nd ed.). Pitman Pub.
Cita Chicago (17th ed.)Johnston, Robert. Cases in Operations Management. 2nd ed. London: Pitman Pub, 1997.
Cita MLA (9th ed.)Johnston, Robert. Cases in Operations Management. 2nd ed. Pitman Pub, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.