by UNESCO
UNESCO, 1957
Buku Teks SO
Soemitro Djojohadikusumo
Institute for Economic and Social Research, Education, and Information, 1977
Buku Teks
Angkatan Bersenjata Republik Indonesia, TNI Angkatan Udara, 1991
Buku Teks
Nanyang Technological University , [date of publication not identified]
Buku Teks SO
Fakultas Teknik Hang Tuah,
Majalah, Jurnal, Buletin