Villegas, B. M. (1971). Economics of an industry. Center for Research and Communication.
芝加哥风格引文Villegas, Bernardo M. Economics of an Industry. [Manila]: Center for Research and Communication, 1971.
MLA引文Villegas, Bernardo M. Economics of an Industry. Center for Research and Communication, 1971.
警告：这些引文格式不一定是100％准确.