APA (7th ed.) Citation

Open University. Mathematics Foundation Course Team. (1971). Number systems. Open University Press.

Chicago Style (17th ed.) Citation

Open University. Mathematics Foundation Course Team. Number Systems. Bletchley (Walton Hall, Bletchley, Bucks.): Open University Press, 1971.

MLA (9th ed.) Citation

Open University. Mathematics Foundation Course Team. Number Systems. Open University Press, 1971.

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