Não informado. (1959). Current literature. National Foundation, Department of Professional Education.
Chicago-referens (17:e uppl.)Não informado. Current Literature. New York: National Foundation, Department of Professional Education, 1959.
MLA-referens (8:e uppl.)Não informado. Current Literature. National Foundation, Department of Professional Education, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.