Toynbee, A. J. (1973). Constantine Porphyrogenitus: And his world. London: Oxford University Press.
Chicago Style CitationToynbee, Arnold J. Constantine Porphyrogenitus: And His World. London: Oxford University Press, 1973.
MLA CitationToynbee, Arnold J. Constantine Porphyrogenitus: And His World. London: Oxford University Press, 1973.
Warning: These citations may not always be 100% accurate.