Elegant, Robert S.
Twayne Publishers, 1951
Buku Teks
Artikel Jurnal
Institute of International Relations, National Chengchi University, 1978
Buku Teks
Townsend, James R.
University of California Press, 1969
Buku Teks
edited by David Zweig and Chen Zhimin
Routledge, 2007
Buku Teks