Bull, P., & Kamionkowski, M. (2013). What if Planck's Universe isn't flat?
芝加哥风格引文Bull, P., 与 M. Kamionkowski. What If Planck's Universe Isn't Flat? 2013.
MLA引文Bull, P., 与 M. Kamionkowski. What If Planck's Universe Isn't Flat? 2013.
警告：这些引文格式不一定是100％准确.