Lane, R. H. (1938). The progressive elementary school: A handbook for principals, teachers and parents. Houghton Mifflin Company.
Chicago-referens (17:e uppl.)Lane, Robert Hill. The Progressive Elementary School: A Handbook for Principals, Teachers and Parents. Boston, New York [etc.]: Houghton Mifflin Company, 1938.
MLA-referens (8:e uppl.)Lane, Robert Hill. The Progressive Elementary School: A Handbook for Principals, Teachers and Parents. Houghton Mifflin Company, 1938.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.