Nadeak, Vera, 		Tambunan, Bonari, 		Hutasoit, Rotua, AND 		Nababan, Juandi.
" THE CORRELATION BETWEEN GRAMMAR MASTERY AND WRITING ABILITY (A CORRELATION STUDY) AT THE TENTH GRADE OF SMK NEGERI 1 SIBORONGBORONG" <em>JURNAL LITTERA: FAKULTAS SASTRA DARMA AGUNG</em> [Online], Volume 1 Number 2 (27 October 2021)