Tolong jelaskan mengenai Sumber tambahan dari Perang Salib Pertama

Harris, Jonathan (2014), Byzantium and the Crusades, Bloomsbury, 2nd ed. ISBN 978-1-78093-767-0

Bibliography of the First Crusade (1095–1099) , compiled by Alan V. Murray, Institute for Medieval Studies, University of Leeds. Extensive and up to date as of 2004.