Buku Teks
Li, Xiaodong, author
China Renmin University Press, 2015
eBooks
Huntington, Ellsworth, author
John Wiley & Sons, 1945
Buku Teks
Brinton, Crane, 1898-1968, author
Prentice-Hall, 1960
Buku Teks
Myers, Bernard S., author
McGraw-Hill, 1967
Buku Teks