Cita APA (7a ed.)

Bergin, F. J. (1995). Successful presentations (1st published.). Director.

Cita Chicago Style (17a ed.)

Bergin, Francis J. Successful Presentations. 1st published. Hemel Hempstead: Director, 1995.

Cita MLA (9a ed.)

Bergin, Francis J. Successful Presentations. 1st published. Director, 1995.