APA (7th ed.) Citation

Booth, A., & Booth, K. H. V. (1956). Automatic digital calculators (2nd ed.). Butterworths Scientific.

Chicago Style (17th ed.) Citation

Booth, A.D., and K. H. V. Booth. Automatic Digital Calculators. 2nd ed. London: Butterworths Scientific, 1956.

MLA (9th ed.) Citation

Booth, A.D., and K. H. V. Booth. Automatic Digital Calculators. 2nd ed. Butterworths Scientific, 1956.