Cita APA (7th ed.)
(2020). Environment at a glance 2020. Organisation for Economic Co-Operation and Development.
Cita Chicago (17th ed.)
Environment at a Glance 2020. Paris, France: Organisation for Economic Co-Operation and Development, 2020.
Cita MLA (9th ed.)
Environment at a Glance 2020. Organisation for Economic Co-Operation and Development, 2020.
Atenció: Aquestes cites poden no estar 100% correctes.