PRRI American Values Atlas, 2017 American Values Atlas, 2017: District of Columbia Vital Records Division, Domestic Partnership Information "District of Columbia Marriage/Relationship Recognition Law," Human Rights Campaign Religious Freedom And Civil Marriage Equality Amendment Act 2009 Text of the bill.
Truy cập ngày 26 tháng 3 năm 2015.  ^ PRRI American Values Atlas, 2017 ^ American Values Atlas, 2017: District of Columbia Vital Records Division, Domestic Partnership Information "District of Columbia Marriage/Relationship Recognition Law," Human Rights Campaign Religious Freedom And Civil Marriage Equality Amendment Act 2009 Text of the bill.