APA (7th ed.) Citation

Open University, Johnson, J., & Slater, R. (1993). Ageing and later life. Sage Publications.

Chicago Style (17th ed.) Citation

Open University, Julia Johnson, and Robert Slater. Ageing and Later Life. London ; Thousand Oaks, Calif.: Sage Publications, 1993.

MLA (8th ed.) Citation

Open University, et al. Ageing and Later Life. Sage Publications, 1993.