Trio, J. K., Valencia, C., Manacsa, R., & Flor, R. (1990). Friendly grocer: Amidst tough competition. UP College of Engineering.
芝加哥风格引文Trio, John Kenneth, Carlos Valencia, Roberto Manacsa, 与 Roger Flor. Friendly Grocer: Amidst Tough Competition. Quezon City: UP College of Engineering, 1990.
MLA引文Trio, John Kenneth, et al. Friendly Grocer: Amidst Tough Competition. UP College of Engineering, 1990.
警告：这些引文格式不一定是100％准确.