Saya mau tau Herodotus, The Histories dari Delfi

Homeric Hymn to Pythian Apollo

Manas, John Helen, Divination, ancient and modern, New York, Pythagorean Society, 1947.

Seyffert, Oskar, "Dictionary of Classical Antiquities" , London: W. Glaisher, 1895.

Spiller, Henry A., John R. Hale, and Jelle Z. de Boer. "The Delphic Oracle: A Multidisciplinary Defense of the Gaseous Vent Theory." Clinical Toxicology 40.2 (2000) 189–196.

West, Martin Litchfield, The Orphic Poems, 1983. .

Situs Warisan Dunia UNESCO di Yunani