APA (7th ed.) Citation

Norwich, J. J. (1993). Byzantium: The apogee. Penguin Books.

Chicago Style (17th ed.) Citation

Norwich, John Julius. Byzantium: The Apogee. London u.a: Penguin Books, 1993.

MLA (9th ed.) Citation

Norwich, John Julius. Byzantium: The Apogee. Penguin Books, 1993.

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