Elizabeth Warren and Amelia Warren Tyagi, The Two-Income Trap: Why Middle-Class Mothers and Fathers Are Going Broke (New York: Basic Books, 2003).
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Timothy S. Grall, «Custodial Mothers and Fathers and Their Child Support: 2011», Current Population Reports no. P60-246 (Washington, DC: US Census Bureau, 2013), по состоянию на 1 января 2016 года.
