Eastaway, R., Wyndham, J., & Shore, B. (2002). How long is a piece of string?: More hidden mathematics of everyday life. Robson Books.
Chicago-referens (17:e uppl.)Eastaway, Rob, Jeremy Wyndham, och Barbara Shore. How Long Is a Piece of String?: More Hidden Mathematics of Everyday Life. London: Robson Books, 2002.
MLA-referens (9:e uppl.)Eastaway, Rob, et al. How Long Is a Piece of String?: More Hidden Mathematics of Everyday Life. Robson Books, 2002.
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