Ramadhanni A, Alimudin A. ANALYSIS OF THE RELATIONSHIP BETWEEN PRICES, PROMOTIONS, VARIANTS OF PRODUCTS AND SALES VOLUME IN LEGO BRAND TOY PRODUCTS IN GRAND CITY SURABAYA. JE [Internet]. 2018Dec.31 [cited 2026May13];19(1):24 -30. Available from: http://ejournal.worldconference.id/index.php/eko/article/view/57