United Nations
United Nations , 1995
Buku Teks SO
Mountjoy, Alan B.
Hutchinson University Library, 1963
Buku Teks
Bauer, Peter T.
University of Chicago Press, 1966
Buku Teks SO
Mountjoy, Alan B.
Hutchinson University Library, 1971
Buku Teks SO
edited by Nick Eberstadt
Frederick A. Praeger, 1981
Buku Teks