APA
Wahlqvist P., Brook R. A., Campbell S. M., Wallander M., Alexander A. M., Smeeding J. E. & Kleinman N. L. (20080212). Objective measurement of work absence and on-the-job productivity: a case-control study of US employees with and without gastroesophageal reflux disease. : Journal of occupational and environmental medicine.
Chicago
Wahlqvist Peter, Brook Richard A, Campbell Sara M, Wallander Mari-Ann, Alexander Anne M, Smeeding Jim E and Kleinman Nathan L. 20080212. Objective measurement of work absence and on-the-job productivity: a case-control study of US employees with and without gastroesophageal reflux disease. : Journal of occupational and environmental medicine.
Harvard
Wahlqvist P., Brook R. A., Campbell S. M., Wallander M., Alexander A. M., Smeeding J. E. and Kleinman N. L. (20080212). Objective measurement of work absence and on-the-job productivity: a case-control study of US employees with and without gastroesophageal reflux disease. : Journal of occupational and environmental medicine.
MLA
Wahlqvist Peter, Brook Richard A, Campbell Sara M, Wallander Mari-Ann, Alexander Anne M, Smeeding Jim E and Kleinman Nathan L. Objective measurement of work absence and on-the-job productivity: a case-control study of US employees with and without gastroesophageal reflux disease. : Journal of occupational and environmental medicine. 20080212.