Sucitra Rahman
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2023
UI - Makalah dan Kertas Kerja
by the Economist Intelligence Unit and the Cartographic Dept. of the Clarendon Press
Oxford University Press, 1956
Buku Referensi
Tikhomirav, M.
Foreign Languages Publishing House, 1959
Buku Teks
Sorokin, G.
Progress Publisher, 1967
Buku Teks
Goncharov, Ivan
Everyman's Library, 1992
Buku Teks