Não informado. (1958). Journal of Environmental Engineering. Society of Environmental Engineers.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of Environmental Engineering. Los Angeles, Calif: Society of Environmental Engineers, 1958.
Citação MLA (8ª ed.)Não informado. Journal of Environmental Engineering. Society of Environmental Engineers, 1958.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.