APA (7th ed.) Citation

Oman, C. W. C. (1892). The Byzantine Empire. Fisher Unwin [u.a.].

Chicago Style (17th ed.) Citation

Oman, Charles William Chadwick. The Byzantine Empire. London: Fisher Unwin [u.a.], 1892.

MLA (9th ed.) Citation

Oman, Charles William Chadwick. The Byzantine Empire. Fisher Unwin [u.a.], 1892.