APA

Hegeman M. A., Bekedam D. J., Bloemenkamp K. W., Kwee A., Papatsonis D. N., van der Post J. A., Lim A. C., Scheepers H. C., Willekes C., Duvekot J. J., Spaanderman M., Porath M., van Eyck J., Haak M. C., van Pampus M. G., Bruinse H. W. & Mol B. W. J. (20100225). Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial. : BMC pregnancy and childbirth.

Chicago

Hegeman Maud A, Bekedam Dick J, Bloemenkamp Kitty Wm, Kwee Anneke, Papatsonis Dimitri Nm, van der Post Joris Am, Lim Arianne C, Scheepers Hubertina Cj, Willekes Christine, Duvekot Johannes J, Spaanderman Marc, Porath Martina, van Eyck Jim, Haak Monique C, van Pampus Marielle G, Bruinse Hein W and Mol Ben Willem J. 20100225. Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial. : BMC pregnancy and childbirth.

Harvard

Hegeman M. A., Bekedam D. J., Bloemenkamp K. W., Kwee A., Papatsonis D. N., van der Post J. A., Lim A. C., Scheepers H. C., Willekes C., Duvekot J. J., Spaanderman M., Porath M., van Eyck J., Haak M. C., van Pampus M. G., Bruinse H. W. and Mol B. W. J. (20100225). Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial. : BMC pregnancy and childbirth.

MLA

Hegeman Maud A, Bekedam Dick J, Bloemenkamp Kitty Wm, Kwee Anneke, Papatsonis Dimitri Nm, van der Post Joris Am, Lim Arianne C, Scheepers Hubertina Cj, Willekes Christine, Duvekot Johannes J, Spaanderman Marc, Porath Martina, van Eyck Jim, Haak Monique C, van Pampus Marielle G, Bruinse Hein W and Mol Ben Willem J. Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial. : BMC pregnancy and childbirth. 20100225.