Ichsa Janand, H., Santi, D. and Rahayu, R. (2025) “Representation of Environmental Awareness in the Song Plastic Tree: A Semiotic Study Based on Ferdinand de Saussure’s Theory”, LITERA : Jurnal Bahasa Dan Sastra, 11(2), pp. 145–152. doi: 10.36002/litera.v11i2.3939.