repository.petra.ac.idrepository.petra.ac.id/17399/1/Publikasi1_04013_2695.pdfDr. Sari Winahjoe,...
15
repository.petra.ac.idrepository.petra.ac.id/17399/1/Publikasi1_04013_2695.pdfDr. Sari Winahjoe, Gadjah Mada University, Indonesia Dr. Sudiyanti, Gadjah Mada University, Indonesia