(1969). Bibliography on the topics of the first International Humanistic Symposium at Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία.
Citação norma ChicagoBibliography On the Topics of the First International Humanistic Symposium At Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία, 1969.
Citação norma MLABibliography On the Topics of the First International Humanistic Symposium At Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία, 1969.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.