Citazione APA

Soto-Ramírez, N., & Karmaus, W. (2008). The use of oral contraceptive before pregnancy and breastfeeding duration: A cross-sectional study with retrospective ascertainment. BioMed Central.

Stile di citazione Chicago

Soto-Ramírez, Nelís, e Wilfried Karmaus. The Use of Oral Contraceptive Before Pregnancy and Breastfeeding Duration: A Cross-sectional Study With Retrospective Ascertainment. BioMed Central, 2008.

Citazione MLA

Soto-Ramírez, Nelís, e Wilfried Karmaus. The Use of Oral Contraceptive Before Pregnancy and Breastfeeding Duration: A Cross-sectional Study With Retrospective Ascertainment. BioMed Central, 2008.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.