Schroeder, Daniel, Kelley Stewart Nichols, Elizabeth McGuinness, Christopher T. King, Esmeralda Garcia, Sarah Looney Oldmixon, and Andy David (2007). Texas Non-Custodial Parent Choices: Preliminary program impact analysis, Austin, TX: Ray Marshall Center. Available at http://raymarshallcenter.org/files/2007/02/ncp_choices_final_prelim.pdf.