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2. BCAAFC, 2018. Doula Services Grant for Aboriginal Families. BC Association of Aboriginal Friendship Centres. 〈http://www.bcaafc.com/index.php/initiatives/doula-support-program/faq-s〉.
3. Beets, V.D. , 2014. The emergence of US hospital- based doula programs [Degree of Doctor of Philosophy]. University of South Carolina.
4. Bey, A., Brill, A., Porchia-Albert, C., Gradilla, M., Strauss, N. , 2019. ADVANCING BIRTH JUSTICE: Community-Based Doula Models as a Standard of Care for Ending Racial Disparities (p. 33). ANCIENT SONG, DOULA SERVICES VILLAGE, BIRTH INTERNATIONAL EVERY MOTHER COUNTS.
5. Birth for Humankind, 2020. Birth for humankind. Birth for Humankind. 〈https://birthforhumankind.org/〉.