APA (7th ed.) Citation

London, K. R. (1979). Introduction to computers (New [i.e. 4th] ed.). Faber.

Chicago Style (17th ed.) Citation

London, Keith R. Introduction to Computers. New [i.e. 4th] ed. London [etc.]: Faber, 1979.

MLA (8th ed.) Citation

London, Keith R. Introduction to Computers. New [i.e. 4th] ed. Faber, 1979.