APA (7th ed.) Citation

Budden, F. J. (1965). An introduction to number scales and computers. Longmans Green.

Chicago Style (17th ed.) Citation

Budden, F. J. An Introduction to Number Scales and Computers. London: Longmans Green, 1965.

MLA (9th ed.) Citation

Budden, F. J. An Introduction to Number Scales and Computers. Longmans Green, 1965.