620s (English Wikipedia)

Shamsi, F. A. (1984). "The Date of Hijrah". Islamic Studies. 23 (4): 189–224, 289–323. doi:10.52541/isiri.v23i04.5909.
Braswell, Geoffrey E.; Christian M. Pager; Cassandra R. Bill; Sonja A. Schwake; Jennifer B. Braswell (2004). "The Rise of Secondary States in the Southeastern Periphery of the Maya World". Ancient Mesoamerica. 15: 219–233. doi:10.1017/s0956536104040143. S2CID 1562928.
J. M. B. Jones (1957). "The Chronology of the "Mag̱ẖāzī"-- A Textual Survey". Bulletin of the School of Oriental and African Studies, University of London. 19 (2): 248. doi:10.1017/S0041977X0013304X. JSTOR 610242.

fordham.edu (Global: 2,122^nd place; English: 1,444^th place)

Bede Book II, Chapter IX. Bede. "Book II". Ecclesiastical History of the English People. Internet History Sourcebooks Project. Archived from the original on 2011-05-13. Retrieved 2021-07-03.
Bede Book II, Chapter XIV. Bede. "Book II". Ecclesiastical History of the English People. Internet History Sourcebooks Project. Archived from the original on 2011-05-13. Retrieved 2021-07-03.

J. M. B. Jones (1957). "The Chronology of the "Mag̱ẖāzī"-- A Textual Survey". Bulletin of the School of Oriental and African Studies, University of London. 19 (2): 248. doi:10.1017/S0041977X0013304X. JSTOR 610242.

Braswell, Geoffrey E.; Christian M. Pager; Cassandra R. Bill; Sonja A. Schwake; Jennifer B. Braswell (2004). "The Rise of Secondary States in the Southeastern Periphery of the Maya World". Ancient Mesoamerica. 15: 219–233. doi:10.1017/s0956536104040143. S2CID 1562928.

Old Book of Tang, vol. 56.
Bede Book II, Chapter IX. Bede. "Book II". Ecclesiastical History of the English People. Internet History Sourcebooks Project. Archived from the original on 2011-05-13. Retrieved 2021-07-03.
Bede Book II, Chapter XIV. Bede. "Book II". Ecclesiastical History of the English People. Internet History Sourcebooks Project. Archived from the original on 2011-05-13. Retrieved 2021-07-03.

Ahmet, Taşağil (1995–2004). Gök-Türkler. Ankara: Türk Tarih Kurumu Basımevi. ISBN 975161113X. OCLC 33892575.

Zizhi Tongjian, ch. 197. Sima Guang (1086). Zizhi Tongjian (資治通鑑) [Comprehensive Mirror for Aid in Government] (in Chinese).