Rikie Kartadie
https://scholar.google.co.id/citations?user=p-pd-scAAAAJ&hl=en&oi=ao
STKIP PGRI Tulungagung
Indonesia
Vertika Panggayuh
https://scholar.google.com/citations?hl=en&user=jaFEwEoAAAAJ
STKIP PGRI Tulungagung
Indonesia