1. Abejo , Socorro Elizabeth M. Go Grace T. Cruz Maria Paz N. Marquez 2006 Contraceptive use, discontinuation and switching behavior in the Philippines
2. Determinants of choosing withdrawal over modern contraceptive methods in Turkey;Cindoglu;The European Journal of Contraception and Reproductive Health Care,2008
3. Cruz , Grace T. Maria Paz N. Marquez Maria Midea M. Kabamalan 2016 Endline Study on Access to Information and Services on Family Planning Among Women in Urban Poor Areas in Manila: Knowledge, Attitude and Practice
4. Family Planning 2020 (FP2020) 2015 Philippines: FP2020 Core Indicator Summary Sheet http://www.track20.org/download/summaries/english/Philippines%20FP2020%20Core%20Indicators.pdf