Clegg Brian. (2004). Crash Course in Personal Development. Kogan Page.
Cita Chicago (17th ed.)Clegg Brian. Crash Course in Personal Development. London: Kogan Page, 2004.
Cita MLA (9th ed.)Clegg Brian. Crash Course in Personal Development. Kogan Page, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.