MLA

Langer, Susanne K. Feeling and Form : a Theory of Art Developed From Philosophy In a New Key. London: Kegan Paul, 1953.

APA

Langer, S. K. (1953). Feeling and Form : a theory of art developed from philosophy in a new key. London: Kegan Paul.

Chicago

Langer, Susanne K. Feeling and Form: A Theory of Art Developed From Philosophy In a New Key. London: Kegan Paul, 1953.