Cita APA (7th ed.)
Freeman, K. (1953). The Pre-Socratic Philosophers: A Companion to Diels, Fragmente der Vorsokratiker. Basil Blackwell.
Cita Chicago (17th ed.)
Freeman, Kathleen. The Pre-Socratic Philosophers: A Companion to Diels, Fragmente Der Vorsokratiker. Oxford, Inglaterra: Basil Blackwell, 1953.
Cita MLA (9th ed.)
Freeman, Kathleen. The Pre-Socratic Philosophers: A Companion to Diels, Fragmente Der Vorsokratiker. Basil Blackwell, 1953.
Atenció: Aquestes cites poden no estar 100% correctes.