APA (7th ed.) Citation

Gibbons, H. A. The Foundation of the Ottoman empire. Frank Cass.

Chicago Style (17th ed.) Citation

Gibbons, Herbert Adams. The Foundation of the Ottoman Empire. London: Frank Cass.

MLA (9th ed.) Citation

Gibbons, Herbert Adams. The Foundation of the Ottoman Empire. Frank Cass.

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