Einhard p.70. Einhard refers to the elephant as the only one Harun al Rashid had ("quem tunc solem habetat"), which is regarded an invention. Thorpe, Lewis (1969). Two lives of Charlemagne (edisi ke-7). Penguin Classics,. hlm. 184. ISBN0140442138.
bib-bvb.de
mdz10.bib-bvb.de
Monumenta Germaniae Historica, Scriptores rerum Germanicarum in usum scholarum separatim editi 6: Annales regni Francorum inde ab a. 741 usque ad a. 829, qui dicuntur Annales Laurissenses maiores et Einhardi. Edited by Friedrich Kurze. Hannover 1895, hal. 116 (digital versionDiarsipkan 2018-06-12 di Wayback Machine.).
Monumenta Germaniae Historica, Scriptores rerum Germanicarum in usum scholarum separatim editi 6: Annales regni Francorum inde ab a. 741 usque ad a. 829, qui dicuntur Annales Laurissenses maiores et Einhardi. Edited by Friedrich Kurze. Hannover 1895, hal. 117 (digital versionDiarsipkan 2018-06-12 di Wayback Machine.).
google.co.uk
books.google.co.uk
Kistler, John M.; Lair, Richard (2006). War elephants. Greenwood Publishing Group. hlm. 187–188. ISBN0275987612.
web.archive.org
Monumenta Germaniae Historica, Scriptores rerum Germanicarum in usum scholarum separatim editi 6: Annales regni Francorum inde ab a. 741 usque ad a. 829, qui dicuntur Annales Laurissenses maiores et Einhardi. Edited by Friedrich Kurze. Hannover 1895, hal. 116 (digital versionDiarsipkan 2018-06-12 di Wayback Machine.).
Monumenta Germaniae Historica, Scriptores rerum Germanicarum in usum scholarum separatim editi 6: Annales regni Francorum inde ab a. 741 usque ad a. 829, qui dicuntur Annales Laurissenses maiores et Einhardi. Edited by Friedrich Kurze. Hannover 1895, hal. 117 (digital versionDiarsipkan 2018-06-12 di Wayback Machine.).
worldcat.org
Sherman, Dennis; Salisbury, Joyce. The West in the World, Volume I: To 1715. 1 (edisi ke-3). New York: McGraw-Hill. hlm. 220. ISBN0073316695. OCLC177823124.