Singh, S., Darroch, J. E., Ashford, L. S., & Vlassoff, M. (2012). Adding It Up: The costs and Benefits of Investing in family Planning and maternal and new born health. GUTTMACHER INSTITUTE.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Singh, Susheela, Jacqueline E. Darroch, Lori S. Ashford, و Michael Vlassoff. Adding It Up: The Costs and Benefits of Investing in Family Planning and Maternal and New Born Health. GUTTMACHER INSTITUTE, 2012.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Singh, Susheela, et al. Adding It Up: The Costs and Benefits of Investing in Family Planning and Maternal and New Born Health. GUTTMACHER INSTITUTE, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.