APA aipamena

Burgan, M. (2008). United States of America. Children's Press.

Chicago Style aipamena

Burgan, Michael. United States of America. Children's Press, 2008.

MLA aipamena

Burgan, Michael. United States of America. Children's Press, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.