APA (7th ed.) Citation

Pirenne, H. (1968). Mohammed and Charlemagne (5. impr.). Allen & Unwin.

Chicago Style (17th ed.) Citation

Pirenne, Henri. Mohammed and Charlemagne. 5. impr. London: Allen & Unwin, 1968.

MLA (9th ed.) Citation

Pirenne, Henri. Mohammed and Charlemagne. 5. impr. Allen & Unwin, 1968.

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