References

Bartholomew, David J, M Knott, and Irini Moustaki. 2011. Latent Variable Models and Factor Analysis : A Unified Approach. 3rd ed. / David Bartholomew, Martin Knott, Irini Moustaki. Wiley Series in Probability and Statistics. Hoboken, N.J.: Wiley.
Bartholomew, David J, Fiona Steele, Jane Galbraith, and Irini Moustaki. 2008. Analysis of Multivariate Social Science Data. Chapman; Hall/CRC.
Everitt, Brian, and Torsten Hothorn. 2011. An Introduction to Applied Multivariate Analysis with r. Springer Science & Business Media.