APA (7th ed.) Citation

Per, N., Øyvind, N., Christian, M., Fredrik, P., & Bjørgulf, C. (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

Per, Nafstad, 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

Per, Nafstad, 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.