APA

Nicholson J. M., Kellar L. C. & Kellar G. M. (20061108). The impact of the interaction between increasing gestational age and obstetrical risk on birth outcomes: evidence of a varying optimal time of delivery. : Journal of perinatology : official journal of the California Perinatal Association.

Chicago

Nicholson J M, Kellar L C and Kellar G M. 20061108. The impact of the interaction between increasing gestational age and obstetrical risk on birth outcomes: evidence of a varying optimal time of delivery. : Journal of perinatology : official journal of the California Perinatal Association.

Harvard

Nicholson J. M., Kellar L. C. and Kellar G. M. (20061108). The impact of the interaction between increasing gestational age and obstetrical risk on birth outcomes: evidence of a varying optimal time of delivery. : Journal of perinatology : official journal of the California Perinatal Association.

MLA

Nicholson J M, Kellar L C and Kellar G M. The impact of the interaction between increasing gestational age and obstetrical risk on birth outcomes: evidence of a varying optimal time of delivery. : Journal of perinatology : official journal of the California Perinatal Association. 20061108.