Columbia subject headings:
Political ethics.
Political science.
Harvard subject headings:
Machiavelli, Niccolò, 1469-1527. Principe.
Political ethics--Early works to 1800.
Political science--Early works to 1800
Princeton subject headings:
Machiavelli, Niccolò, 1469-1527. Principe--Controversial literature--Early works to 1800.
Political ethics--Early works to 1800.
Political science--Early works to 1800.