APA Citation

Santayana, G. (. (1923). The unknowable: The Herbert Spencer lecture delivered at Oxford, 24 October, 1923. Oxford: A the Clarendon Press.

Chicago Style Citation

Santayana, George (1863-1952). The Unknowable: The Herbert Spencer Lecture Delivered At Oxford, 24 October, 1923. Oxford: A the Clarendon Press, 1923.

MLA Citation

Santayana, George (1863-1952). The Unknowable: The Herbert Spencer Lecture Delivered At Oxford, 24 October, 1923. Oxford: A the Clarendon Press, 1923.

Warning: These citations may not always be 100% accurate.