Harvard-Yenching Institute, 1995
Majalah, Jurnal, Buletin
Korea : Asiatic Research Center
Majalah, Jurnal, Buletin
Grossman, 1967
Buku Teks
American Society of Civil Engineers and the Water Pollution Control Federation., 1969.
Buku Teks
American Institute of Certified Public Accounts, 1983
Buku Teks