(1969). Bibliography on the topics of the first International Humanistic Symposium at Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία.
استشهاد بنمط شيكاغوBibliography On the Topics of the First International Humanistic Symposium At Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία, 1969.
MLA استشهادBibliography On the Topics of the First International Humanistic Symposium At Delphi: 27 September - 4 October 1969. Αθήναι: Ελληνική Ανθρωπιστική Εταιρεία, 1969.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.