"VII. Magic Squares". Mathematical Recreations & Essays: 12th Edition, Toronto: University of Toronto Press, 1974, pp. 193-221. https://doi.org/10.3138/9781442656529-010
(1974). VII. Magic Squares. In Mathematical Recreations & Essays: 12th Edition (pp. 193-221). Toronto: University of Toronto Press. https://doi.org/10.3138/9781442656529-010
1974. VII. Magic Squares. Mathematical Recreations & Essays: 12th Edition. Toronto: University of Toronto Press, pp. 193-221. https://doi.org/10.3138/9781442656529-010
"VII. Magic Squares" In Mathematical Recreations & Essays: 12th Edition, 193-221. Toronto: University of Toronto Press, 1974. https://doi.org/10.3138/9781442656529-010
VII. Magic Squares. In: Mathematical Recreations & Essays: 12th Edition. Toronto: University of Toronto Press; 1974. p.193-221. https://doi.org/10.3138/9781442656529-010