APA (7th ed.) Citation

Nuffield Mathematics Project. (1969). Problems, green set. Published for the Nuffield Foundation by W & R Chambers and J. Murray.

Chicago Style (17th ed.) Citation

Nuffield Mathematics Project. Problems, Green Set. [Place of publication not identified]: Published for the Nuffield Foundation by W & R Chambers and J. Murray, 1969.

MLA (9th ed.) Citation

Nuffield Mathematics Project. Problems, Green Set. Published for the Nuffield Foundation by W & R Chambers and J. Murray, 1969.