Singh, Y. (1981). Population trends and population education (1st.). Sheth.
芝加哥风格引文Singh, Y. Population Trends and Population Education. 1st. Bombay: Sheth, 1981.
MLA引文Singh, Y. Population Trends and Population Education. 1st. Sheth, 1981.
警告：这些引文格式不一定是100％准确.