Witt, P. W. (1964). Modern developments in audiovisual instruction: A presentation prepared for the International Conference and Exhibition, Education today and tomorrow-planning the role of audio-visual aids, UNESCO Building, Paris, 11th-15th November 1963. s.n.
Citazione stile Chigago Style (17a edizione)Witt, Paul W.F. Modern Developments in Audiovisual Instruction: A Presentation Prepared for the International Conference and Exhibition, Education Today and Tomorrow-planning the Role of Audio-visual Aids, UNESCO Building, Paris, 11th-15th November 1963. [New York: s.n, 1964.
Citatione MLA (9a ed.)Witt, Paul W.F. Modern Developments in Audiovisual Instruction: A Presentation Prepared for the International Conference and Exhibition, Education Today and Tomorrow-planning the Role of Audio-visual Aids, UNESCO Building, Paris, 11th-15th November 1963. s.n, 1964.