Film, TV and theatrical adaptations
University of Glasgow - MyGlasgow - Archives & Special Collections - Scottish Theatre Archive
http://special.lib.gla.ac.uk/sta/search/detaile.cfm?EID=14750
Death on the Nile
Book sources - Wikipedia
https://en.wikipedia.org/wiki/Special:BookSources/0-85967-991-8International Standard Book Number - Wikipedia
https://en.wikipedia.org/wiki/ISBN_(identifier)American Tribute to Agatha Christie
http://home.insightbb.com/~jsmarcum/agatha35.htm