1. A history of e-learning;Nicholson,2007
2. Historiana. Library Cataloghttps://historiana.eu/
3. DocsTeachhttps://www.docsteach.org/
4. Teaching with online primary sources: Documents from the national archives: DocsTeach.gov from the national archives;Hussey,2011
5. The Virtual Historian. L’historien Virtuelhttps://www.virtualhistorian.ca/