Fergusson, Erna
The University of New Mexico Press, 1966
Buku Teks SO
edited by Vincenzo Costigliola
Springer, 2012
eBooks
Tang, Leang-Li
China United Press , 1936
Buku Teks
Gonzales, Joseph
Strategic Information and Research Development Centre, 2011
Buku Teks SO
Keyes, Daniel
Xiao Zhitang Wenhua, 1995
Buku Teks