Josephus
Arrian
Diodorus Siculus
Appian
Plutarch
Cassio Dio
Herodian (Book V)
Procopius

Nepos
Augustus
Florus (Latin)
Velleius
Curtius Rufus (Latin)
Justin
Suetonius
Scriptores Historiae Augustae (Latin)
Ammianus Marcellinus (Latin)
Aurelian Victor (Latin)
Eutropius