Bodin, Jean. The Six Books of a Commonweal. Trans. Richard Knolles (1606).

Diodorus Sicilius. The Library of History. 34.

(perhaps) Justin. Historiarum Philippicarum. 2.5.

Seneca the Elder. Controversiae. 7.6.

REFERENCE : Philip Edwards and Colin Gibson, eds. The Plays and Poems of Philip Massinger. 4 vols. Oxford: Clarendon Press, 1976. 1.302-4.