1. Management Accounting Concepts;International Federation of Accountants (IFAC),1998
2. International Guidance Document of EMA;International Federation of Accountants (IFAC),2005
3. United Nations Division for Sustainable Development. Environmental Management Accounting, Procedures and Principles;UNDESA/DSD,2001
4. United Nations Division for Sustainable Development. Environmental Management Accounting: Policies and Linkages;UNDESA/DSD,2002