APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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