Effect of Mobile-Augmented Reality (MAR) in Digital Encyclopedia on The Complex Problem Solving and Attitudes of Undergraduate Student. - Alfyananda Kurnia Putra; Sumarmi Sumarmi; Alfi Sahrina; Azni Fajrilia; Muhammad Naufal Islam; Batchuluun Yembuu (Int. J. Emerg. Technol. Learn., 2021)