Hanifah, H. “IMPLEMENTATION OF WORK SHEET BASED ON APOS MODEL ON INTEGRAL CALCULUS COLLEGE IN THE SUBJECT OF THE TRANSENDENT FUNCTION IN STUDY PROGRAM IN MATHEMATICS EDUCATION FKIP UNIB ACADEMIC YEAR 2017/2018”. TRIADIK, vol. 16, no. 2, Aug. 2019, doi:10.33369/triadik.v16i2.8867.