Mendoza, P. R. (2000). Half-full or half-empty? Philippine Graphic.
Cita Chicago Style (17a ed.)Mendoza, Psyche Roxas. "Half-full or Half-empty?" Philippine Graphic 2000.
Cita MLA (9a ed.)Mendoza, Psyche Roxas. "Half-full or Half-empty?" Philippine Graphic, 2000.
Precaución: Estas citas no son 100% exactas.