Violence in
Republican Rome (Oxford University Press, 1968, 2nd edition 1999).
Violence, Civil Strife and Revolution in the Classical City (Johns Hopkins University Press, 1982, reprinted 1987).
Judicial Reform and Land Reform in the Roman Republic (Cambridge University Press, 1992).
Cambridge Ancient History: The Last Age of the Roman Republic, 146–43 b.c. (Cambridge University Press, 1992), vol. 9, coedited with J. A. Crook and Elizabeth Rawson;[4] contributed "The Crisis of the Republic: Sources and Source-problems,"[5] "The Roman Empire and Its Problems in the Late Second Century,"[6] "Political History, 146–95 b.c.,"[7] "Epilogue: The fall of the Roman Republic."[8]
Imperium Romanum: Politics and Administration (Routledge, 1993).
Cambridge Ancient History: The Augustan Empire, 43 B.C–A.D. 69 (Cambridge University Press, 1996), vol. 10, coedited with Alan K. Bowman and Edward Champlin.[9]
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Cassius Dio and the History of the Late Roman Republic," Aufstieg und Niedergang der römischen Welt II.34.3 (1997), 2497–2523.
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Aristotle and the
Mixed Constitution," in Alternatives to Athens: Varieties of Political Organization and Community in Ancient Greece, edited by R. Brock and S. Hodkinson (Oxford 2000), 152–66.[11]
Cicero as Evidence: A Historian's Companion (Oxford University Press, 2008).
The Romans in the Age of Augustus (Blackwell, 2010).