DOLI MAULANA GAMA SAMUDERA LUBIS, S.PSI., M.PSI. PSIKOLOGI LINGKUNGAN. [s.l.] : Widina Media Utama,2026. DOI: 10.59818/38xfnd60. Disponível em: https://omp.penerbitwidina.com/index.php/widina/catalog/book/148. Acesso em: 6 nov. 2026.