Não informado. (1973). Index of Conference Proceedings Received. British Library, Lending Division.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Index of Conference Proceedings Received. Boston, Inglaterra: British Library, Lending Division, 1973.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Index of Conference Proceedings Received. British Library, Lending Division, 1973.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.