Cita APA (7th ed.)

Zetterberg, H. (1956). Sociology in the United States of America. UNESCO.

Cita Chicago (17th ed.)

Zetterberg, Hans. Sociology in the United States of America. París: UNESCO, 1956.

Cita MLA (9th ed.)

Zetterberg, Hans. Sociology in the United States of America. UNESCO, 1956.