Early first-trimester free beta-hCG and PAPP-A serum distributions in monochorionic and dichorionic twins.

MLA

Linskens IH, et al. “Early First-Trimester Free Beta-HCG and PAPP-A Serum Distributions in Monochorionic and Dichorionic Twins.” Prenatal Diagnosis, vol. 29, no. 1, Jan. 2009, pp. 74–78. EBSCOhost, https://doi.org/10.1002/pd.2184.

APA

Linskens IH, Spreeuwenberg MD, Blankenstein MA, & van Vugt JM. (2009). Early first-trimester free beta-hCG and PAPP-A serum distributions in monochorionic and dichorionic twins. Prenatal Diagnosis, 29(1), 74–78. https://doi.org/10.1002/pd.2184

Chicago

Linskens IH, Spreeuwenberg MD, Blankenstein MA, and van Vugt JM. 2009. “Early First-Trimester Free Beta-HCG and PAPP-A Serum Distributions in Monochorionic and Dichorionic Twins.” Prenatal Diagnosis 29 (1): 74–78. doi:10.1002/pd.2184.