Mahruf, F. N. A. .; Boer, K. M.; sucipta, J. A. W.; Agustian, J. F. Representation of Environmental Issues in Marjan’s "Baruna the Guardian of the Ocean&Quot; Ad 2023 Episode 1 and 2 (Analysis Semiotika Charles Sanders Peirce). JISS 2024, 5, 667-686.