Wittich,Walter Arno and Schuller,Charles Francis. (1957). Audio-Visual Materials Their Nature and Use (IInd edition 1957.). Harper and Brothers,Publishers.
Chicago Edition CitationWittich,Walter Arno and Schuller,Charles Francis. Audio-Visual Materials Their Nature and Use. IInd edition 1957. New York: Harper and Brothers,Publishers, 1957.
MLA Edition CitationWittich,Walter Arno and Schuller,Charles Francis. Audio-Visual Materials Their Nature and Use. IInd edition 1957. Harper and Brothers,Publishers, 1957.
Warning: These citations may not always be 100% accurate.