ZEILENGA, D. G. (1992). As/400 A Practical Guide To Programming And Operation Donald G. Zeilenga And Donna M. Lenczycki. QED Publishing group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZEILENGA, Donald G. As/400 A Practical Guide To Programming And Operation Donald G. Zeilenga And Donna M. Lenczycki. QED Publishing group, 1992.
एमएलए (8वां संस्करण) प्रशस्ति पत्रZEILENGA, Donald G. As/400 A Practical Guide To Programming And Operation Donald G. Zeilenga And Donna M. Lenczycki. QED Publishing group, 1992.
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