Cita APA (7th ed.)

HENNESSY, B. (1981). Public opini --Ed.4. Brooks/Cole Publishing.

Cita Chicago (17th ed.)

HENNESSY, Bernard. Public Opini --Ed.4. Monterey: Brooks/Cole Publishing, 1981.

Cita MLA (9th ed.)

HENNESSY, Bernard. Public Opini --Ed.4. Brooks/Cole Publishing, 1981.