Volume 28, Issue 2, September 2014
10.22067/jpp.v28i2.40424
Volume 27, Issue 4, December 2013
10.22067/jpp.v27i4.29945
Volume 27, Issue 3, October 2013, Pages 36-52
10.22067/jpp.v27i3.26815
Volume 27, Issue 1, June 2013, Pages 1-18
10.22067/jpp.v27i1.22327