Langer, S. K. K. (1951). Philosophy in a new key: A study in the symbolism of reason, rite and art. Harvard Univ. Press.

Langer, Susanne Katherina Knauth. Philosophy in a New Key: A Study in the Symbolism of Reason, Rite and Art. Cambridge, Mass.: Harvard Univ. Press, 1951.

Langer, Susanne Katherina Knauth. Philosophy in a New Key: A Study in the Symbolism of Reason, Rite and Art. Harvard Univ. Press, 1951.