Não informado. (1963). Educational psychologist. American Psychological Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Educational Psychologist. Hillsdale, NJ: American Psychological Association, 1963.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Educational Psychologist. American Psychological Association, 1963.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.