Michael J. MacKenzie, David J. Tucker: Death and taxes: Child health and the state tax freedom race. In: Children and Youth Services Review. Band32, Nr.12, Dezember 2010, S.1803–1806, doi:10.1016/j.childyouth.2010.07.026 (elsevier.com [abgerufen am 9. Februar 2023]).
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Michael J. MacKenzie, David J. Tucker: Death and taxes: Child health and the state tax freedom race. In: Children and Youth Services Review. Band32, Nr.12, Dezember 2010, S.1803–1806, doi:10.1016/j.childyouth.2010.07.026 (elsevier.com [abgerufen am 9. Februar 2023]).
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William K. Carroll, Yildiz Atasoy: Global Shaping and Its Alternatives. University of Toronto Press, 2003, ISBN 1-55193-043-9, S.44 (eingeschränkte Vorschau in der Google-Buchsuche).
Betty A. Dobratz: Power, Politics, and Society: An Introduction to Political Sociology. Routledge, 2015, ISBN 978-1-317-34528-2, S.250 (eingeschränkte Vorschau in der Google-Buchsuche).
Paul Nightingale: Why the concept of a Tax Freedom Day is ridiculous. In: The Guardian. 30. Mai 2013, ISSN0261-3077 (theguardian.com [abgerufen am 9. Februar 2023]).
Paul Nightingale: Why the concept of a Tax Freedom Day is ridiculous. In: The Guardian. 30. Mai 2013, ISSN0261-3077 (theguardian.com [abgerufen am 9. Februar 2023]).