O'BRIEN, T. (2003). Promoting positive behaviour. David Fulton.
Cita Chicago (17th ed.)O'BRIEN, Tim. Promoting Positive Behaviour. London: David Fulton, 2003.
Cita MLA (9th ed.)O'BRIEN, Tim. Promoting Positive Behaviour. David Fulton, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.