Kwik, Kwan-Kiat
[University California], 1966
Buku Teks
Sie, Kwat Soen
Centre for Agricultural Publications and Documentation, 1968
Buku Teks
Mackintosh, A.S.
Cambridge University Press , 1963
Buku Teks
United Nations , 1961
Buku Teks
Palvia, Chand Mal
Institute of Social Studies, 1953
Buku Teks