Cita APA

(1991). Technical progress on protecting the ozone layer: Refrigeration, air conditioning and heat pumps technical options committee. [Lugar de publicación no identificado]: United Nations Environment Programme.

Citación estilo Chicago

Technical Progress On Protecting the Ozone Layer: Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee. [Lugar de publicación no identificado]: United Nations Environment Programme, 1991.

Cita MLA

Technical Progress On Protecting the Ozone Layer: Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee. [Lugar de publicación no identificado]: United Nations Environment Programme, 1991.