ebrary, Inc, & Polakow, V. (2004). Shut out: Low income mothers and higher education in post-welfare America. State University of New York Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, و Valerie Polakow. Shut Out: Low Income Mothers and Higher Education in Post-welfare America. Albany: State University of New York Press, 2004.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, و Valerie Polakow. Shut Out: Low Income Mothers and Higher Education in Post-welfare America. State University of New York Press, 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.