APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Leedham, John, and Derick Unwin. Programmed Learning in the Schools. [London]: Longmans, 1965.

MLA (9th ed.) Citation

Leedham, John, and Derick Unwin. Programmed Learning in the Schools. Longmans, 1965.