edited by Arnold Wolfers
[Publisher not identified], 1959
Buku Teks SO
edited by Edward McWhinney [and others]
Martinus Nijhoff Publishers, 1991
Buku Teks SO
Schweitzer, Albert
Henry Holt, 1958
Buku Teks SO
Ziegler, David M.
Little, Brown, 1981
Buku Teks
Dulles, John Foster
Macmillan, 1950
Buku Teks SO