Engel, A. S. (2015). Microbial life of cave systems. De Gruyter.
芝加哥风格引文Engel, Annette Summers. Microbial Life of Cave Systems. Berlin, Germany ; Boston, [Massachusetts]: De Gruyter, 2015.
MLA引文Engel, Annette Summers. Microbial Life of Cave Systems. De Gruyter, 2015.
警告：这些引文格式不一定是100％准确.