Nahin, P. J. (1998). An imaginary tale: The story of [the square root of minus one]. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Nahin, Paul J. An Imaginary Tale: The Story of [the Square Root of Minus One]. Princeton, N.J.: Princeton University Press, 1998.
Lua MLA (8ú heag.)Nahin, Paul J. An Imaginary Tale: The Story of [the Square Root of Minus One]. Princeton University Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.