Umali, P. S. M. (2007). Logic: The art of living with reason. Mindshapers.
Cita Chicago Style (17a ed.)Umali, Pepe San Miguel. Logic: The Art of Living with Reason. Manila: Mindshapers, 2007.
Cita MLA (9a ed.)Umali, Pepe San Miguel. Logic: The Art of Living with Reason. Mindshapers, 2007.
Precaución: Estas citas no son 100% exactas.