Cita APA

Lewis, H. T. n. 1., & Lewis, H. T. n. 1. (1939). Problems in industrial purchasing (2. edition.). New York, New York: McGraw-Hill.

Citación estilo Chicago

Lewis, Howard Thompson n. 1888, y Howard Thompson n. 1888 Lewis. Problems in Industrial Purchasing. 2. edition. New York, New York: McGraw-Hill, 1939.

Cita MLA

Lewis, Howard Thompson n. 1888, y Howard Thompson n. 1888 Lewis. Problems in Industrial Purchasing. 2. edition. New York, New York: McGraw-Hill, 1939.