Davis, E. R., & Hummel, W. C. (1952). Readings for opinion. Prentice-Hall.
Cita Chicago (17th ed.)Davis, Earle Rosco, i William C. Hummel. Readings for Opinion. New York: Prentice-Hall, 1952.
Cita MLA (9th ed.)Davis, Earle Rosco, i William C. Hummel. Readings for Opinion. Prentice-Hall, 1952.
Atenció: Aquestes cites poden no estar 100% correctes.