Hongkong Kingsway International Publications 1981
Buku Referensi
Amsterdam : Noord-Hollandsche Uitg
Majalah, Jurnal, Buletin
Singapura : Nanyang Technological University, 2005,
Majalah, Jurnal, Buletin
New York, Department of Public Information United Nations, 1957
Buku Referensi
Bandoeng : A.C. NIX
Majalah, Jurnal, Buletin