Freeman, K. (1948). Ancilla to the Pre-Socratic Philosophers: By Kathleen Freeman (1st publ.). Blackwell.
Chicago-referens (17:e uppl.)Freeman, Kathleen. Ancilla to the Pre-Socratic Philosophers: By Kathleen Freeman. 1st publ. Oxford: Blackwell, 1948.
MLA-referens (8:e uppl.)Freeman, Kathleen. Ancilla to the Pre-Socratic Philosophers: By Kathleen Freeman. 1st publ. Blackwell, 1948.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.