Lua APA (7ú heag.)

U.S. Environmental Protection Agency EPA. Terms of Environment, Glossary, Abbreviations and Acronyms.

Lua i Stíl Chicago (17ú heag.)

U.S. Environmental Protection Agency EPA. Terms of Environment, Glossary, Abbreviations and Acronyms.

Lua MLA (9ú heag.)

U.S. Environmental Protection Agency EPA. Terms of Environment, Glossary, Abbreviations and Acronyms.

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