Inter-Parliamentary Union
Facts on File Publications, 1986
Buku Referensi
Inter-Parliamentary Union
Facts on File Publications, 1986
Buku Referensi
Brogan, D.W. (Denis William), author
Harcourt, Brace & World, 1963
Buku Teks
Roskin, Michael G., 1939-, author
Pearson Education, 2015
Buku Teks
McWhinney, Edward, author
A.W. Sijthoff, 1966
Buku Teks