JURNAL PETRA
Vol 6 No 2 (2019)

JURNAL PETRA
Vol 6 No 1 (2019)

jurnal PETRA
Vol 5 No 2 (2018)

Jurnal PETRA
Vol 5 No 1 (2018)

Jurnal PETRA
Vol 3 No 1 (2017)

Jurnal PETRA
Vol 2 No 2 (2016)

Jurnal PETRA
Vol 2 No 1 (2016)

Jurnal PETRA
Vol 1 No 1 (2015)