Elegant, Robert S.
Twayne Publishers, 1951
Buku Teks
Yu, Yu-Lin
WLFD ROC Chapter, 1992
Buku Teks
Artikel Jurnal
Institute of International Relations, National Chengchi University, 1978
Buku Teks
Townsend, James R.
University of California Press, 1969
Buku Teks