Langley, C., Langley, C., & Hancock, G. (2012). Development of Techniques for Trace Gas Detection in Breath.
芝加哥风格引文Langley, C., Cathryn Langley, 与 G. Hancock. Development of Techniques for Trace Gas Detection in Breath. 2012.
MLA引文Langley, C., et al. Development of Techniques for Trace Gas Detection in Breath. 2012.
警告：这些引文格式不一定是100％准确.