Não informado. (1959). Current literature. National Foundation, Department of Professional Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Current Literature. New York: National Foundation, Department of Professional Education, 1959.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Current Literature. National Foundation, Department of Professional Education, 1959.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.