Não informado. University of Iowa studies in education. University of Iowa, College of Education.
Chicago-referens (17:e uppl.)Não informado. University of Iowa Studies in Education. Iowa City, Iowa: University of Iowa, College of Education.
MLA-referens (8:e uppl.)Não informado. University of Iowa Studies in Education. University of Iowa, College of Education.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.