Panggabean, C. I., and I. Kesuma. “LANGUAGE LEARNING STRATEGIES OF HIGH PROFICIENCY STUDENTS IN THEIR ORAL PRESENTATION AT ENGLISH LANGUAGE EDUCATION OF PGRI RONGGOLAWE UNIVERSITY TUBAN”. OKARA: Jurnal Bahasa Dan Sastra, Vol. 11, no. 2, Dec. 2017, pp. 205-14, doi:10.19105/ojbs.v11i2.1501.