Cita APA (7a ed.)

O'Brien, P. (1997). Positive management: Assertiveness for managers (Reprint.). Nicholas Brealey.

Cita Chicago Style (17a ed.)

O'Brien, Paddy. Positive Management: Assertiveness for Managers. Reprint. London: Nicholas Brealey, 1997.

Cita MLA (9a ed.)

O'Brien, Paddy. Positive Management: Assertiveness for Managers. Reprint. Nicholas Brealey, 1997.