Handbook of Polytomous Item Response Theory Models Editat de Michael Nering et al. 6 apr 2010 Hardback Preț: 572.13 lei 673.09 lei 6-8 săpt. -15%
Polytomous Item Response Theory Models Quantitative Applications in the Social Sciences, nr. 144 Autor Remo Ostini et al. 28 sep 2005 Paperback Preț: 336.50 lei 6-8 săpt.