APA (7th ed.) Citation

Learner, A., & Powell, A. J. (1976). An introduction to Algol 68 through problems (Repr.). Macmillan.

Chicago Style (17th ed.) Citation

Learner, Arnold, and Anthony J. Powell. An Introduction to Algol 68 Through Problems. Repr. London: Macmillan, 1976.

MLA (9th ed.) Citation

Learner, Arnold, and Anthony J. Powell. An Introduction to Algol 68 Through Problems. Repr. Macmillan, 1976.