Stephens, Jacqueline H, Douglas D Shaw, and Ann P Koehler. “Legionella Pneumophila: Probable Transmission from a Contaminated Respiratory Device”. Communicable Diseases Intelligence 39 (June 1, 2015): 201–203. Accessed April 7, 2026. https://ojs.cdi.cdc.gov.au/index.php/cdi/article/view/1066.