Esbensen, T. (1968). Working with individualized instruction: The Duluth experience. Fearon Publishers.
Chicago-referens (17:e uppl.)Esbensen, Thorwald. Working with Individualized Instruction: The Duluth Experience. Palo Alto, Calif.: Fearon Publishers, 1968.
MLA-referens (8:e uppl.)Esbensen, Thorwald. Working with Individualized Instruction: The Duluth Experience. Fearon Publishers, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.