Gardner, M. (1963). Martin Gardner's Sixth book of mathematical games from Scientific American (NA.). W.H. Freeman and Company.
Citazione stile Chigago Style (17a edizione)Gardner, Martin. Martin Gardner's Sixth Book of Mathematical Games from Scientific American. NA. San Francisco: W.H. Freeman and Company, 1963.
Citatione MLA (9a ed.)Gardner, Martin. Martin Gardner's Sixth Book of Mathematical Games from Scientific American. NA. W.H. Freeman and Company, 1963.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.