APA

Christensen B. H., Thulstrup A. M., Hougaard K. S., Skadhauge L. R., Hansen K. S., Frydenberg M. & Schlünssen V. (20130416). Maternal occupational exposure to asthmogens during pregnancy and risk of asthma in 7-year-old children: a cohort study. : BMJ open.

Chicago

Christensen Berit Hvass, Thulstrup Ane Marie, Hougaard Karin Sørig, Skadhauge Lars R, Hansen Kirsten Skamstrup, Frydenberg Morten and Schlünssen Vivi. 20130416. Maternal occupational exposure to asthmogens during pregnancy and risk of asthma in 7-year-old children: a cohort study. : BMJ open.

Harvard

Christensen B. H., Thulstrup A. M., Hougaard K. S., Skadhauge L. R., Hansen K. S., Frydenberg M. and Schlünssen V. (20130416). Maternal occupational exposure to asthmogens during pregnancy and risk of asthma in 7-year-old children: a cohort study. : BMJ open.

MLA

Christensen Berit Hvass, Thulstrup Ane Marie, Hougaard Karin Sørig, Skadhauge Lars R, Hansen Kirsten Skamstrup, Frydenberg Morten and Schlünssen Vivi. Maternal occupational exposure to asthmogens during pregnancy and risk of asthma in 7-year-old children: a cohort study. : BMJ open. 20130416.