ebrary, Inc, Brunt, L., & Steger, B. (2008). Worlds of sleep. Frank & Timme.
芝加哥风格引文ebrary, Inc, Lodewijk Brunt, 与 Brigitte Steger. Worlds of Sleep. Berlin: Frank & Timme, 2008.
MLA引文ebrary, Inc, et al. Worlds of Sleep. Frank & Timme, 2008.
警告：这些引文格式不一定是100％准确.