Lane, R. H. (1938). The progressive elementary school: A handbook for principals, teachers and parents. Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)Lane, Robert Hill. The Progressive Elementary School: A Handbook for Principals, Teachers and Parents. Boston, New York [etc.]: Houghton Mifflin Company, 1938.
Lua MLA (8ú heag.)Lane, Robert Hill. The Progressive Elementary School: A Handbook for Principals, Teachers and Parents. Houghton Mifflin Company, 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.