APA (7th ed.) Citation

Uhlig, H., & Koletzko, S. (2012). Too much hygiene? Current state of knowledge on the etiology of chronic inflammatory bowel disease.

Chicago Style (17th ed.) Citation

Uhlig, H., and S. Koletzko. Too Much Hygiene? Current State of Knowledge on the Etiology of Chronic Inflammatory Bowel Disease. 2012.

MLA (9th ed.) Citation

Uhlig, H., and S. Koletzko. Too Much Hygiene? Current State of Knowledge on the Etiology of Chronic Inflammatory Bowel Disease. 2012.

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