"The Folklore Tradition of Jack Tales". The Center for Children's Books. Graduate School of Library and Information Science University of Illinois at Urbana-Champaign. 15 Ocak 2004. 10 Nisan 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 11 Haziran 2014.
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"The Folklore Tradition of Jack Tales". The Center for Children's Books. Graduate School of Library and Information Science University of Illinois at Urbana-Champaign. 15 Ocak 2004. 10 Nisan 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 11 Haziran 2014.