MacDorman, Marian F.; Declercq, Eugene; Mathews, T.J. (2014). "Recent Trends in Out-of-Hospital Births in the United States". Journal of Midwifery & Women's Health. 58 (5): 494–501. doi:10.1111/jmwh.12092. ISSN1526-9523. PMID26055924.
MacDorman, Marian F.; Declercq, Eugene; Mathews, T.J. (2014). "Recent Trends in Out-of-Hospital Births in the United States". Journal of Midwifery & Women's Health. 58 (5): 494–501. doi:10.1111/jmwh.12092. ISSN1526-9523. PMID26055924.
MacDorman, Marian F.; Declercq, Eugene; Mathews, T.J. (2014). "Recent Trends in Out-of-Hospital Births in the United States". Journal of Midwifery & Women's Health. 58 (5): 494–501. doi:10.1111/jmwh.12092. ISSN1526-9523. PMID26055924.