Houghton, R. W. (1970). Public finance. Penguin Books.
Cita Chicago (17th ed.)Houghton, R. W. Public Finance. Harmondsworth: Penguin Books, 1970.
Cita MLA (9th ed.)Houghton, R. W. Public Finance. Penguin Books, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.