Cita APA (7th ed.)

Leedham, J., & Unwin, D. (1965). Programmed learning in the schools. Longmans, Green & Co..

Cita Chicago (17th ed.)

Leedham, John, i Derick Unwin. Programmed Learning in the Schools. London: Longmans, Green & Co., 1965.

Cita MLA (8th ed.)

Leedham, John, i Derick Unwin. Programmed Learning in the Schools. Longmans, Green & Co., 1965.