Karmaus Wilfried & Soto-Ramírez Nelís. (2008). The use of oral contraceptive before pregnancy and breastfeeding duration: A cross-sectional study with retrospective ascertainment. BMC.
Chicago Style (17th ed.) CitationKarmaus Wilfried and Soto-Ramírez Nelís. The Use of Oral Contraceptive Before Pregnancy and Breastfeeding Duration: A Cross-sectional Study with Retrospective Ascertainment. BMC, 2008.
MLA (9th ed.) CitationKarmaus Wilfried and Soto-Ramírez Nelís. The Use of Oral Contraceptive Before Pregnancy and Breastfeeding Duration: A Cross-sectional Study with Retrospective Ascertainment. BMC, 2008.
Warning: These citations may not always be 100% accurate.