Não informado. (1964). Scientia paedagogica experimentalis. Centre for Experimental Educational Research.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Scientia Paedagogica Experimentalis. Gent, Belgica: Centre for Experimental Educational Research, 1964.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Scientia Paedagogica Experimentalis. Centre for Experimental Educational Research, 1964.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.