Naimpathy, S. (1963). A new course in trignometry (2nd.). Popular Prakashan.
芝加哥风格引文Naimpathy, S. A New Course in Trignometry. 2nd. Bombay: Popular Prakashan, 1963.
MLA引文Naimpathy, S. A New Course in Trignometry. 2nd. Popular Prakashan, 1963.
警告：这些引文格式不一定是100％准确.