Hayuningtyas, Ninditya Enggawati, Tri Suminar, and Erni Suharini. “Effectiveness of Project Based Learning and Guided Inquiry to Improve Learning Achievement and Entrepreneurship in Blora, Indonesia”. Journal of Primary Education 8, no. 9 (October 17, 2019): 254-260. Accessed October 31, 2020. https://journal.unnes.ac.id/sju/index.php/jpe/article/view/34899.