Umali, R. M. (1976). Outline of taxation. Rex Book Store.
Cita Chicago Style (17a ed.)Umali, Roman M. Outline of Taxation. Manila: Rex Book Store, 1976.
Cita MLA (9a ed.)Umali, Roman M. Outline of Taxation. Rex Book Store, 1976.
Precaución: Estas citas no son 100% exactas.