Brethower, D. M. (1963). Programed instruction: A manual of programing techniques; a self-instructional program. Educational Methods.
Chicago-referens (17:e uppl.)Brethower, Dale M. Programed Instruction: A Manual of Programing Techniques; a Self-instructional Program. Chicago: Educational Methods, 1963.
MLA-referens (9:e uppl.)Brethower, Dale M. Programed Instruction: A Manual of Programing Techniques; a Self-instructional Program. Educational Methods, 1963.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.