Ulum, S.
(2019).
 Efesiensi Teknis Usaha Tani Kentang di Kabupaten Lumajang.
<em>UNEJ E-Proceeding, </em>.
Retrieved from <a href="https://jurnal.unej.ac.id/index.php/prosiding/article/view/10650" target="_new">https://jurnal.unej.ac.id/index.php/prosiding/article/view/10650</a>