Sangalang, L. P. J. (1982). A product mix optimization model. Philippine Engineering Journal.
芝加哥风格引文Sangalang, Leonardo P. Jr. "A Product Mix Optimization Model." Philippine Engineering Journal 1982.
MLA引文Sangalang, Leonardo P. Jr. "A Product Mix Optimization Model." Philippine Engineering Journal, 1982.
警告：这些引文格式不一定是100％准确.