Hughes, J. L. (1962). Programed instruction for schools and industry. Science Research Associates.
Citazione stile Chigago Style (17a edizione)Hughes, John Leo. Programed Instruction for Schools and Industry. Chicago: Science Research Associates, 1962.
Citatione MLA (9a ed.)Hughes, John Leo. Programed Instruction for Schools and Industry. Science Research Associates, 1962.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.