APA (7th ed.) Citation

Nafstad Per, Næss Øyvind, Madsen Christian, Piro Fredrik, & Claussen Bjørgulf. (2008). A comparison of self reported air pollution problems and GIS-modeled levels of air pollution in people with and without chronic diseases. BMC.

Chicago Style (17th ed.) Citation

Nafstad Per, Næss Øyvind, Madsen Christian, Piro Fredrik, and Claussen Bjørgulf. A Comparison of Self Reported Air Pollution Problems and GIS-modeled Levels of Air Pollution in People with and Without Chronic Diseases. BMC, 2008.

MLA (9th ed.) Citation

Nafstad Per, et al. A Comparison of Self Reported Air Pollution Problems and GIS-modeled Levels of Air Pollution in People with and Without Chronic Diseases. BMC, 2008.

Warning: These citations may not always be 100% accurate.