APA

Luke B., Brown M. B., Alexandre P. K., Kinoshi T., O'Sullivan M. J., Martin D., Misiunas R. B., Nugent C., van de Ven C., Newman R. B., Mauldin J. G. & Witter F. R. (20050401). The cost of twin pregnancy: maternal and neonatal factors. : American journal of obstetrics and gynecology.

Chicago

Luke Barbara, Brown Morton B, Alexandre Pierre K, Kinoshi Toyin, O'Sullivan Mary Jo, Martin Dibe, Misiunas Ruta B, Nugent Clark, van de Ven Cosmas, Newman Roger B, Mauldin Jill G and Witter Frank R. 20050401. The cost of twin pregnancy: maternal and neonatal factors. : American journal of obstetrics and gynecology.

Harvard

Luke B., Brown M. B., Alexandre P. K., Kinoshi T., O'Sullivan M. J., Martin D., Misiunas R. B., Nugent C., van de Ven C., Newman R. B., Mauldin J. G. and Witter F. R. (20050401). The cost of twin pregnancy: maternal and neonatal factors. : American journal of obstetrics and gynecology.

MLA

Luke Barbara, Brown Morton B, Alexandre Pierre K, Kinoshi Toyin, O'Sullivan Mary Jo, Martin Dibe, Misiunas Ruta B, Nugent Clark, van de Ven Cosmas, Newman Roger B, Mauldin Jill G and Witter Frank R. The cost of twin pregnancy: maternal and neonatal factors. : American journal of obstetrics and gynecology. 20050401.