Valix, C. T., & Valix, C. A. M. (2015). Practical accounting 1 (2015 rev ed.). GIC Enterprises.
Lua i Stíl Chicago (17ú heag.)Valix, Conrado T., agus Christian Aris M. Valix. Practical Accounting 1. 2015 rev ed. Manila, Philippines: GIC Enterprises, 2015.
Lua MLA (9ú heag.)Valix, Conrado T., agus Christian Aris M. Valix. Practical Accounting 1. 2015 rev ed. GIC Enterprises, 2015.
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