APA (7th ed.) Citation

Hardy Kenneth & Williams Kenneth S. (1997). The green book of mathematical problems. Dover.

Chicago Style (17th ed.) Citation

Hardy Kenneth and Williams Kenneth S. The Green Book of Mathematical Problems. Dover, 1997.

MLA (8th ed.) Citation

Hardy Kenneth and Williams Kenneth S. The Green Book of Mathematical Problems. Dover, 1997.

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