Coba jelasin Rujuakan dari Puncak Abad Partangahan dalam bahasa minangkabau dong

John H. Mundy, Europe in the High Middle Ages, 1150-1309'' Harlow, England, Longman (2000) ISBN 0-582-36987-8

Music of the Middle Ages: 475-1500

Middle Ages: The High Middle Ages on Columbia Electronic Encyclopedia at infoplease

Provençal literature on Columbia Electronic Encyclopedia at infoplease