Pekanbaru : PT. Chevron Pacific Indonesia, 2005,
Majalah, Jurnal, Buletin
Prague : The Press and Information Department
Majalah, Jurnal, Buletin
New World Press
Majalah, Jurnal, Buletin
Depok : Institute of social service UI, 2000,
Majalah, Jurnal, Buletin
Institute of Southeast Asian Studies, 1992
Majalah, Jurnal, Buletin