APA (7th ed.) Citation

Lines, M. E. (1990). Think of a number : ideas, concepts and problems which challenge the mind and baffle the experts / Malcolm E. Lines: Ideas, concepts and problems which challenge the mind and baffle the experts. Hilger.

Chicago Style (17th ed.) Citation

Lines, M. E. Think of a Number : Ideas, Concepts and Problems Which Challenge the Mind and Baffle the Experts / Malcolm E. Lines: Ideas, Concepts and Problems Which Challenge the Mind and Baffle the Experts. Bristol: Hilger, 1990.

MLA (9th ed.) Citation

Lines, M. E. Think of a Number : Ideas, Concepts and Problems Which Challenge the Mind and Baffle the Experts / Malcolm E. Lines: Ideas, Concepts and Problems Which Challenge the Mind and Baffle the Experts. Hilger, 1990.

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