Ajmal, M. (1963). Our knowledge of the external world. Pakistan Philosophical Congress Publication.
芝加哥风格引文Ajmal, Muhammad. "Our Knowledge of the External World." Pakistan Philosophical Congress Publication 1963.
MLA引文Ajmal, Muhammad. "Our Knowledge of the External World." Pakistan Philosophical Congress Publication, 1963.
警告：这些引文格式不一定是100％准确.