Dean Andrews, Ruth Bradley, Bebe Cave: Agatha and the Truth of Murder. Darlow Smithson Productions, Factual Fiction, Missota, 19. April 2019, abgerufen am 16. Oktober 2023.
Alison Flood: And then there was one: the campaign to find the world’s favourite Agatha Christie book. In: The Guardian. 27. April 2015, ISSN0261-3077 (theguardian.com [abgerufen am 16. Oktober 2023]).
Maev Kennedy: British Museum buys Assyrian treasures cleaned by Agatha Christie. In: The Guardian. 7. März 2011, ISSN0261-3077 (theguardian.com [abgerufen am 16. Oktober 2023]).
Alison Flood: And then there was one: the campaign to find the world’s favourite Agatha Christie book. In: The Guardian. 27. April 2015, ISSN0261-3077 (theguardian.com [abgerufen am 16. Oktober 2023]).
Maev Kennedy: British Museum buys Assyrian treasures cleaned by Agatha Christie. In: The Guardian. 7. März 2011, ISSN0261-3077 (theguardian.com [abgerufen am 16. Oktober 2023]).