Abrams, M.H. Ed. A Glossary of Literary Terms. 5th ed. United States of America: Holt, Rinehart and Winston, 1988.

Abrams, M.H. Ed. The Norton Anthology of English Literature. 6th ed. Vol. 2. New York: Norton, 1993.

"Neo-classic and Romantic". A Glossary of Literary Terms. Ed. M.H. Abrams, 5th de. United States of America: Holt, Rinehart and Winston, 1988.

"The Romantic Period". The Norton Anthology of English Literature. 6th ed. Vol. 2. New York: Norton, 1983)

"Utopias and Dystopias". A Glossary of Literary Terms. 5th ed. United States of America: Holt, Rinehart and Winston, 1988.

Spark, Muriel. Mary Shelley. New York: Meridian, 1988.

Cinemania ´97. CD-ROM. United States of America: Microsoft® Corporation, 1992-1996.

Encarta ´95. CD-ROM. United States of America: Microsoft® Corporation, 1994.

Encarta ´99. Encyclopedie Winkler Prins Editie. CD-ROM. United States of America: Microsoft® Corporation/Elsevier, 1993-1998.