Lua APA (7ú heag.)

Spellman, F. R. (1999). The science of environmental pollution. Technomic Pub. Co..

Lua i Stíl Chicago (17ú heag.)

Spellman, Frank R. The Science of Environmental Pollution. Lancaster, Pa.: Technomic Pub. Co., 1999.

Lua MLA (8ú heag.)

Spellman, Frank R. The Science of Environmental Pollution. Technomic Pub. Co., 1999.

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