Lua APA (7ú heag.)

PERKINS, H. (1974). Air Pollution Henry Perkins. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

PERKINS, Henry. Air Pollution Henry Perkins. McGraw-Hill, 1974.

Lua MLA (8ú heag.)

PERKINS, Henry. Air Pollution Henry Perkins. McGraw-Hill, 1974.

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