Payap University Journal
Vol. 29 No. 2 (2019)

Payap University Journal
Vol. 29 No. 1 (2019)

Payap University Journal
Vol. 28 No. 2 (2018)

Payap University Journal
Vol. 28 No. 1 (2018)

Payap University Journal
Vol. 27 No. 2 (2017)

Payap University Journal
Vol. 27 No. 1 (2017)

Payap University Journal
Vol. 26 No. 2 (2016)

Payap University Journal
Vol. 26 No. 1 (2016)

Payap University Journal
Vol. 25 No. 2 (2015)

Payap University Journal
Vol. 25 No. 1 (2015)