Peterborough Cathedral Peterborough, England
- 1. CATHEDRAL CHURCH OF ST PETER, ST PAUL AND ST ANDREW. National Heritage List for England.
- 2. Peterborough Cathedral. official website.
- 3. Peterborough. Encyclopaedia Britannica Online.
- 4. Hull, Lesley. Hedda Stone. peterboroughcathedral.wordpress.com. 2020. A cathedral tour guide discusses the difficult dating of the Hedda Stone.
- 5. John Murray. Peterborough Cathedral. Encyclopaedia Romana. 1862.
- 6. Ousby, Ian. Blue Guide England. pp. 273-275. W. W. Norton & Company, 1995.
- 7. Reilly, Lisa A.. Peterborough. doi.org. Detailed description of Peterborough Cathedral's architecture by the author of a dissertation and book on the topic.
- 8. Schutz, Bernhard. Great Cathedrals. pp. 168-275. Harry N. Abrams, 2002.