Cita APA (7a ed.)

Freeman, K. (1949). The pre-socratics philosophers (2 ed.). Basil Blackwell.

Cita Chicago Style (17a ed.)

Freeman, Kathleen. The Pre-socratics Philosophers. 2 ed. Oxford: Basil Blackwell, 1949.

Cita MLA (8a ed.)

Freeman, Kathleen. The Pre-socratics Philosophers. 2 ed. Basil Blackwell, 1949.