Olson, S. S. (1999). International environmental standards handbook. Lewis Publishers.
Cita Chicago (17th ed.)Olson, Scott S. International Environmental Standards Handbook. Boca Raton: Lewis Publishers, 1999.
Cita MLA (9th ed.)Olson, Scott S. International Environmental Standards Handbook. Lewis Publishers, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.