Sukajie, B., C. M Noor, A. Suparwo, Y. Komalasari, R. D Sulastriningsih, and L. Hakim. “Value of Eco-Label on Organic Vegetables”. Proceeding Interuniversity Forum for Strengthening Academic Competency, Vol. 1, no. 1, May 2019, pp. 29 -34, http://proceedings.conference.unpas.ac.id/index.php/ifsac/article/view/115.