Eastaway, R., Wyndham, J., & Shore, B. (2002). How long is a piece of string?: More hidden mathematics of everyday life. Robson Books.
Lua i Stíl Chicago (17ú heag.)Eastaway, Rob, Jeremy Wyndham, agus Barbara Shore. How Long Is a Piece of String?: More Hidden Mathematics of Everyday Life. London: Robson Books, 2002.
Lua MLA (9ú heag.)Eastaway, Rob, et al. How Long Is a Piece of String?: More Hidden Mathematics of Everyday Life. Robson Books, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.