Pyle, w. W. (1970). Programmed Learning Aid For Elementary Accounting William W. Pyle. Learning Systems.
Čikaški stil citiranja (17. izdanje)Pyle, william W. Programmed Learning Aid For Elementary Accounting William W. Pyle. Learning Systems, 1970.
MLA način citiranja (8. izdanje)Pyle, william W. Programmed Learning Aid For Elementary Accounting William W. Pyle. Learning Systems, 1970.
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