Steiner, U., Tuljapurkar, S., Coulson, T., & Horvitz, C. (2012). Trading stages: Life expectancies in structured populations.
芝加哥风格引文Steiner, UK, S. Tuljapurkar, T. Coulson, 与 C. Horvitz. Trading Stages: Life Expectancies in Structured Populations. 2012.
MLA引文Steiner, UK, et al. Trading Stages: Life Expectancies in Structured Populations. 2012.
警告：这些引文格式不一定是100％准确.