Whyte, Robert Orr, author
Westview Press, 1982
Buku Teks
Bernstein, Thomas P.
New Haven, 1977
Buku Teks
Artikel Jurnal
Nelson, Nici
Pergamon Press, 1979
Buku Teks
Gamble, Sidney D., author
International Secretariat, Intitute of Pacific Relations, 1954
Buku Teks