Valencia, E. I. (1977). President Sergio Osmena. s.n.] Regal Printing.
芝加哥风格引文Valencia, Elpidio I. President Sergio Osmena. [s.l., Manila: s.n.] Regal Printing, 1977.
MLA引文Valencia, Elpidio I. President Sergio Osmena. s.n.] Regal Printing, 1977.
警告：这些引文格式不一定是100％准确.