Astuti, F.K. 2018. MOOD STRUCTURE TYPE OF THE CLAUSE ANALYSIS IN ENGLISH TEXT BOOKS OF SMA: A DISCOURSE STUDY BASED ON SYSTEMIC FUNCTIONAL LINGUISTIC THEORY. Edukasi Lingua Sastra. 16, 2 (Oct. 2018), 46–58. DOI:https://doi.org/10.47637/elsa.v16i2.93.