Lindberg, L. (1954). The democratic classroom: A guide for teachers. Bureau of Publications, Teachers College, Columbia University.
Chicago-referens (17:e uppl.)Lindberg, Lucile. The Democratic Classroom: A Guide for Teachers. New York: Bureau of Publications, Teachers College, Columbia University, 1954.
MLA-referens (8:e uppl.)Lindberg, Lucile. The Democratic Classroom: A Guide for Teachers. Bureau of Publications, Teachers College, Columbia University, 1954.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.