Espina, R. L. (1997). Negros development shifts. IN The southern beat [column]. Philippine Star.
芝加哥风格引文Espina, Rolly L. "Negros Development Shifts. IN The Southern Beat [column]." Philippine Star 1997.
MLA引文Espina, Rolly L. "Negros Development Shifts. IN The Southern Beat [column]." Philippine Star, 1997.
警告：这些引文格式不一定是100％准确.