APA (7th ed.) Citation

Essential Structures Research Association, Brand, G., & Bell, J. (1976). Sphere cells & surfaces. E.S.R.A..

Chicago Style (17th ed.) Citation

Essential Structures Research Association, Graham Brand, and Jim Bell. Sphere Cells & Surfaces. London: E.S.R.A., 1976.

MLA (8th ed.) Citation

Essential Structures Research Association, et al. Sphere Cells & Surfaces. E.S.R.A., 1976.