Lua APA (7ú heag.)

Hill, M. (2004). understanding environmental pollution (2nd.). CUP.

Lua i Stíl Chicago (17ú heag.)

Hill, Marquita. Understanding Environmental Pollution. 2nd. Cambridge: CUP, 2004.

Lua MLA (9ú heag.)

Hill, Marquita. Understanding Environmental Pollution. 2nd. CUP, 2004.

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