Di Franco Giovanni e Alberto Marradi (1972). Factor analysis and principal component analysis. Milano: Franco Angeli. ISBN 8820457520
Within the vast archipelago of data analysis tools, factor analysis and principal component analysis are among the islands more frequently visited by human scientists. This book is devoted to those who wish to exercise full intellectual control over the tools they employ, while acquiring the ability to critically appraise the results obtained in relation to the objectives of their research projects.