APA (7th ed.) Citation

(2007). The progressive era in the USA: 1890-1921. Ashgate.

Chicago Style (17th ed.) Citation

The Progressive Era in the USA: 1890-1921. Aldershot [u.a.]: Ashgate, 2007.

MLA (9th ed.) Citation

The Progressive Era in the USA: 1890-1921. Ashgate, 2007.

Warning: These citations may not always be 100% accurate.