(1969). Bibliography on the topics of the first International Humanistic Symposium at Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία.
Παραπομπή Chicago StyleBibliography On the Topics of the First International Humanistic Symposium At Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία, 1969.
Deismireacht MLABibliography On the Topics of the First International Humanistic Symposium At Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία, 1969.
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