Pradana, Agrissto Bintang Aji, and Marisatul Khasanah. “Peluang Dan Tantangan Pengintegrasian Environmental Education Dalam Materi Ajar Bahasa Inggris”. Prosiding University Research Colloquium (January 21, 2019): 114–120. Accessed April 15, 2025. https://repository.urecol.org/index.php/proceeding/article/view/337.