Clarke, H. I. (1957). Social legislation (2nd ed.). Appleton-Century-Crofts.
Cita Chicago (17th ed.)Clarke, Helen Isabel. Social Legislation. 2nd ed. New York: Appleton-Century-Crofts, 1957.
Cita MLA (9th ed.)Clarke, Helen Isabel. Social Legislation. 2nd ed. Appleton-Century-Crofts, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.