The Cambridge Ancient History. 2nd ed.; 14 vols. Cambridge: Cambridge University Press, 1970–2006. Online (with subscription): https://www.cambridge.org/core/series/cambridge-ancient-history/ 010C506409EE858277F898C129759025
CIL
Corpus inscriptionum Latinarum. 17+ vols. Königlich Preussische Akademie der Wissenschaften zu Berlin, Berlin. 1893–.
FRHist
The Fragments of the Roman Historians (3 vols.), ed. Timothy Cornell et al. Oxford: Oxford University Press, 2014.