RAKESH VALLABHBHAI DOBARIYA. “A Study Of The Effect Of Teaching Multimedia On The Achievement Of Students Studying Of ‘National Income’ Unit In Economics Subject”. Vidhyayana - An International Multidisciplinary Peer-Reviewed E-Journal - ISSN 2454-8596, vol. 4, no. 4, Feb. 2019, http://j.vidhyayanaejournal.org/index.php/journal/article/view/1191.