Lua APA (7ú heag.)

Não informado. (1952). Refrigeration service and contracting. Refrigeration Service Engineers Society.

Lua i Stíl Chicago (17ú heag.)

Não informado. Refrigeration Service and Contracting. Chicago, Ill: Refrigeration Service Engineers Society, 1952.

Lua MLA (8ú heag.)

Não informado. Refrigeration Service and Contracting. Refrigeration Service Engineers Society, 1952.

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