editors, Harold Chang ... [and others]
United Pascific International, 1983
Buku Referensi
Loewe, Michael
Frederick A. Preager, 1965
Buku Teks SO
Payne, Robert
Dodd, Mead, 1947
Buku Teks SO
edited by Albert Feuerwerker
Prentice-Hall, 1964
Buku Teks SO
Pye, Lucian W., 1921-2008
Little, Brown, 1972
Buku Teks SO