ebrary, Inc, Leishman, J. L., & Moir, J. (2007). Pre-teen and teenage pregnancy: A twenty-first century reality. M&K Update.
芝加哥风格引文ebrary, Inc, June L. Leishman, 与 James Moir. Pre-teen and Teenage Pregnancy: A Twenty-first Century Reality. Keswick [England]: M&K Update, 2007.
MLA引文ebrary, Inc, et al. Pre-teen and Teenage Pregnancy: A Twenty-first Century Reality. M&K Update, 2007.
警告：这些引文格式不一定是100％准确.