Smith, A., Stewart, D., Wightman, W. P. D., Bryce, J. C., Ross, I. S., & Wightman, W. P. D. (1980). Essays on philosophical subjects. Oxford: Clarendon Press.

Smith, Adam, Dugald Stewart, W. P. D. Wightman, J. C. Bryce, Ian Simpson Ross, and William Persehouse Delisle Wightman. Essays On Philosophical Subjects. Oxford: Clarendon Press, 1980.

Smith, Adam, et al. Essays On Philosophical Subjects. Oxford: Clarendon Press, 1980.