Cita APA (7th ed.)

Hennessy, B. C., & Hennessy, E. (1981). Public opinion (4th ed.). Brooks/Cole Pub. Co.

Cita Chicago (17th ed.)

Hennessy, Bernard C., i Erna Hennessy. Public Opinion. 4th ed. Monterey, Calif: Brooks/Cole Pub. Co, 1981.

Cita MLA (9th ed.)

Hennessy, Bernard C., i Erna Hennessy. Public Opinion. 4th ed. Brooks/Cole Pub. Co, 1981.