關於羅馬皇帝的參考資料浩如煙海，下麵謹列出一些可能會為深度閱讀提供基礎的英語文獻。
綜合與參考
Cancik, Hubert, Helmuth Schneider, Christine F. Salazar, and David E. Orton, eds. Brill's New Pauly: Encyclopaedia of the Ancient World. English ed. Leiden, Ned.: Brill, 2002.
Hornblower, Simon, Anthony Spawforth, and Esther Eidinow. The Oxford Classical Dictionary. 4th ed. Oxford: Oxford University Press, 2012.
OCRE“Online Coins of the Roman Empire” http://numismatics.org/ocre/. “Orbis, The Stanford Geospatial Network of the Ancient World” http://orbis.stanford.edu.
Talbert, Richard J. A., ed. The Barrington Atlas of the Ancient Greco-Roman World. Princeton, NJ: Princeton University Press, 2000.
古代文獻
許多古代文獻的原文和英譯本都可以從網上獲得，這裏介紹幾個很好的網站：Lacus Curtius: Into the Roman World, http://penelope.uchicago.edu/Thayer/E/Roman/home.html; Perseus DigitalLibrary, www.perseus.tufts.edu; and Livius.org,
Articles on Ancient History, www.livius.org。最後一個網站既提供古代文獻，也載有科普文章。
本書提及的古代文獻多數都可以從洛布古典圖書(哈佛大學出版社)獲得雙語對照版。以下是一些重要文獻的其他英譯本：
Birley, Anthony. Lives of the Later Caesars: The First Part of the Augustan History, with Newly Compiled Lives of Nerva and Trajan. Harmondsworth, UK: Penguin Books, 1976.
Cocceianus, Cassius Dio. The Roman History: the Reign of Augustus. Translated byIan Scott-Kilvert. Harmondsworth, UK: Penguin Books, 1987.
Josephus. The Jewish War. Edited by Martin Goodman. Translated by Martin Hammond. Oxford: Oxford University Press, 2017.
Marcus Aurelius. Meditations. Translated by and with a foreword by Gregory Hays. Modern Library ed. New York: Modern Library, 2002.
Pliny the Younger. Complete Letters. Translated by P. G. Walsh. Oxford: Oxford University Press, 2009.