APA (7th ed.) Citation

Poulsen, G., Kurinczuk, J., Wolke, D., Boyle, E., Field, D., Alfirevic, Z., & Quigley, M. (2011). Accurate reporting of expected delivery date by mothers 9 months after birth.

Chicago Style (17th ed.) Citation

Poulsen, G., J. Kurinczuk, D. Wolke, E. Boyle, D. Field, Z. Alfirevic, and M. Quigley. Accurate Reporting of Expected Delivery Date by Mothers 9 Months After Birth. 2011.

MLA (9th ed.) Citation

Poulsen, G., et al. Accurate Reporting of Expected Delivery Date by Mothers 9 Months After Birth. 2011.