Illinois Natural History Survey. (2001). Biological notes. Natural History Survey Division.
Citação do estilo Chicago (17ª ed.)Illinois Natural History Survey. Biological Notes. Urbana, Ill: Natural History Survey Division, 2001.
Citação MLA (8ª ed.)Illinois Natural History Survey. Biological Notes. Natural History Survey Division, 2001.
警告：这些引文格式不一定是100％准确.