Cita APA (7a ed.)

Toulmin, S. E. (1972). Human understanding. Clarendon.

Cita Chicago Style (17a ed.)

Toulmin, Stephen Edelston. Human Understanding. Oxford: Clarendon, 1972.

Cita MLA (9a ed.)

Toulmin, Stephen Edelston. Human Understanding. Clarendon, 1972.