Cita APA (7th ed.)

Hughes, J. L. (1962). Programed instruction for schools and industry. Science Research Associates.

Cita Chicago (17th ed.)

Hughes, John Leo. Programed Instruction for Schools and Industry. Chicago: Science Research Associates, 1962.

Cita MLA (9th ed.)

Hughes, John Leo. Programed Instruction for Schools and Industry. Science Research Associates, 1962.