Mar 2, 2010 #1 P popepie New member Joined Mar 2, 2010 Messages 1 Reaction score 0 Points 1 ed. from 1999.? Were there some major diferences or improvements of theory, especially of the second and third models, in comparison to first edition? Is first edition still sufficient and relevant for my college thesis?
ed. from 1999.? Were there some major diferences or improvements of theory, especially of the second and third models, in comparison to first edition? Is first edition still sufficient and relevant for my college thesis?