^Dunglison, Robley (1857). Medical lexicon. A dictionary of medical science, 1857 edition, s.v. "Pornography" (頁面存檔備份,存於網際網路檔案館). From the 牛津英語詞典, second edition (1989), Oxford University Press, Retrieved on 11月30日, 2006年.
^Sigel, Lisa. Governing Pleasures. Pornography and Social Change in England, 1815-1914. Rutgers University Press. 2002. ISBN 978-0-8135-3001-7.
^An American dictionary of the English language, new and revised edition (1864), s.v. "Pornography" (頁面存檔備份,存於網際網路檔案館). From the 牛津英語詞典, second edition (1989), Oxford University Press, Retrieved on 11月30日, 2006年.