The Roman antiquities.

MLA

Cary, Earnest, Edward Spelman, and Dionysius Halicarnassensis. The Roman Antiquities. Reprint Cambridge, MA: Harvard University Press, 2006.

APA

Cary, E., Spelman, E., & Dionysius Halicarnassensis, D. Halicarnassensis. (2006). The Roman antiquities. Reprint Cambridge, MA: Harvard University Press.

Chicago

Spelman, Edward, and Dionysius Halicarnassensis. The Roman Antiquities. [1] Books 1-2. Translated by Earnest Cary. Reprint Cambridge, MA: Harvard University Press, 2006.