Krishnan, P. (1992). The elderly population in developed... world. B.R. Pub.
芝加哥风格引文Krishnan, P. The Elderly Population in Developed... World. Delhi: B.R. Pub, 1992.
MLA引文Krishnan, P. The Elderly Population in Developed... World. B.R. Pub, 1992.
警告：这些引文格式不一定是100％准确.