Korea seen from abroad
Seoul: The Korea Herald, 1976
 Buku Teks
North Korea seen from abroad
Korea Information Service Inc., 1976
 Buku Teks
Ray, Sibnarayan
Vietnam : seen from east and west
Melbourne and Sydney : Thomas Nelson (Austrakia) Ltd., 1966.
 Buku Teks
Korean seen from abroad Korea Information Service
Seoul Korea Herald 1976,
 Buku Teks
Efraim Julian Rangga
Faktor-faktor penyebab kejahatan ransomware sebagai bentuk malware di Indonesia, ditinjau dari kerangka routine activity theory = Causality factors of ransomware as a part of malware in Indonesia, seen from framework of routine activity theory
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2018
 UI - Tugas Akhir