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Buku Referensi
United Nations Conference on Human Environment, 1972
Buku Teks SO
Atikah Adyas, Yusuf Kristanto, Ede Surya Darmawan, Ali Ghufron Mukti
UI Publishing, 2019
Buku Teks
Embassy of the United States of America, 1998
Buku Teks
Aderua Katinus
2019
UI - Skripsi Membership