APA (7th ed.) Citation

Birtwistle, C. (1971). Mathematical puzzles and perplexities: How to make the most of them. Allen & Unwin.

Chicago Style (17th ed.) Citation

Birtwistle, Claude. Mathematical Puzzles and Perplexities: How to Make the Most of Them. London: Allen & Unwin, 1971.

MLA (9th ed.) Citation

Birtwistle, Claude. Mathematical Puzzles and Perplexities: How to Make the Most of Them. Allen & Unwin, 1971.

Warning: These citations may not always be 100% accurate.