Internet sources

http://www.luminarium.org/sevenlit/donne/

A website dedicated to English literature from the Middle Ages up to the 17th century. Here you’ll find links to all the online texts of his work and a lot of additional sources.

http://www.online-literature.com/donne/

http://www.english-literature.org/essays/donne.html

http://www.sparknotes.com/poetry/donne/

A study guide on Donne's poetry.

http://www.sparknotes.com/home/english/

Sparknotes is a website that offers study guides for (US) high-school students. These guides are written by graduates and under-graduates from Harvard University. The website contains a lot of English literature from every period. Each work is discussed in detail, and in many cases, there is an online text available. The information itself is very good, but the advertisements make it a bit annoying.