Mercer, G. (1963). Loose-leaf and hand-posting systems, machine accounting equipment (2ed.). Mac donald and evans.
Παραπομπή Chicago StyleMercer, G.Lawrence. Loose-leaf and Hand-posting Systems, Machine Accounting Equipment. 2ed. London: Mac donald and evans, 1963.
Παραπομπή MLAMercer, G.Lawrence. Loose-leaf and Hand-posting Systems, Machine Accounting Equipment. 2ed. Mac donald and evans, 1963.
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