APA

Nicholson J. M., Stenson M. H., Kellar L. C., Caughey A. B. & Macones G. A. (20090406). Active management of risk in nulliparous pregnancy at term: association between a higher preventive labor induction rate and improved birth outcomes. : American journal of obstetrics and gynecology.

Chicago

Nicholson James M, Stenson Morghan H, Kellar Lisa C, Caughey Aaron B and Macones George A. 20090406. Active management of risk in nulliparous pregnancy at term: association between a higher preventive labor induction rate and improved birth outcomes. : American journal of obstetrics and gynecology.

Harvard

Nicholson J. M., Stenson M. H., Kellar L. C., Caughey A. B. and Macones G. A. (20090406). Active management of risk in nulliparous pregnancy at term: association between a higher preventive labor induction rate and improved birth outcomes. : American journal of obstetrics and gynecology.

MLA

Nicholson James M, Stenson Morghan H, Kellar Lisa C, Caughey Aaron B and Macones George A. Active management of risk in nulliparous pregnancy at term: association between a higher preventive labor induction rate and improved birth outcomes. : American journal of obstetrics and gynecology. 20090406.