1. Vol 8, Issue 1
2. Vol 8, Issue 2
3. Vol 8, Issue 3
4. Vol 8, Issue 4
1. Vol 7, Issue 1
2. Vol 7, Issue 2
3. Vol 7, Issue 3
Article Submission System
PER is an open access journal that publishes high-quality articles, in English. All articles published in PER will be peer-reviewed. PER will be published four times a year (one volume per year), in January, April, August, and December starting from 2021. Articles that do not comply with the Per’s rules, without using PER’s template, whose similarity is above 15%, which handle a single dependent variable and are longer than necessary will not be evaluated. PER has been indexed by ERIC since Vol 5(1).
