Gw mau tau Silsilah dari Pippin I dari Aquitaine

Collins, Roger. "Pippin I and the Kingdom of Aquitaine." Charlemagne's Heir: New Perspectives on the Reign of Louis the Pious, edd. P. Godman and Roger Collins. Oxford: Oxford University Press, 1990. Reprinted in Law, Culture and Regionalism in Early Medieval Spain. Variorum, 1992. ISBN 0-86078-308-1.