Hughes, J. L. Programed learning: A critical evaluation. Pitman.
Chicago Style (17th ed.) CitationHughes, J. L. Programed Learning: A Critical Evaluation. London: Pitman.
MLA (9th ed.) CitationHughes, J. L. Programed Learning: A Critical Evaluation. Pitman.
Warning: These citations may not always be 100% accurate.