Weymar, Paul
A. Deutsch, 1957
Buku Teks
Deddy Wibowo Lesmana
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1979
UI - Skripsi Membership
Naura Azka Hanifa
The Press and Information Office of the Federal Government, 1961
Buku Teks
Press and Information Office of the Federal Government, 1961
Buku Teks
Barton, Greg
Saufa, IRCiSoD, LKIS, 2016
Buku Teks