Não informado. (1987). NEED: News environment energy development. Unit of Documentation and Liaison on Ecodevelopment.
Citação do estilo Chicago (17ª ed.)Não informado. NEED: News Environment Energy Development. Paris: Unit of Documentation and Liaison on Ecodevelopment, 1987.
Citação MLA (8ª ed.)Não informado. NEED: News Environment Energy Development. Unit of Documentation and Liaison on Ecodevelopment, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.