APA (7th ed.) Citation

Acton, J. R., & Squire, P. T. (1985). Solving equations with physical understanding. A. Hilger.

Chicago Style (17th ed.) Citation

Acton, J. R., and P. T. Squire. Solving Equations with Physical Understanding. Bristol: A. Hilger, 1985.

MLA (9th ed.) Citation

Acton, J. R., and P. T. Squire. Solving Equations with Physical Understanding. A. Hilger, 1985.