1. S. Vera, Mawardi, and D. Kurniasih, J. Ilm. Ar-Razi [Scientific Journal Ar-Razi] 1, 105–112 (2019).
2. A. Qurniawati, S. Sugiharto, and A. N. C. Saputro, J. Pendidik. Kim [Journal of Chemical Education] 2, 166– 174 (2013).
3. M. Situmorang, Kimia Lingkungan[Environmental Chemistry] (Rajawali Pers, Depok, 2017).
4. U. Prioritas, Pembelajaran IPA SMP di LPTK[Junior High Science Learning in LPTK] (USAID, Jakarta, 2014).
5. The Relationship between Environmental Literacy and Self-efficacy Beliefs toward Environmental Education