Lua APA (7ú heag.)

PUFFETT, R. (1991). Plumbing Services Mechanical Services Air Conditioning Rj Puffett, Lj. Hossack. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

PUFFETT, RJ. Plumbing Services Mechanical Services Air Conditioning Rj Puffett, Lj. Hossack. McGraw-Hill, 1991.

Lua MLA (8ú heag.)

PUFFETT, RJ. Plumbing Services Mechanical Services Air Conditioning Rj Puffett, Lj. Hossack. McGraw-Hill, 1991.

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