Cita APA (7th ed.)

Gillen, T. (1992). Assertiveness for managers. Gower.

Cita Chicago (17th ed.)

Gillen, Terry. Assertiveness for Managers. Aldershot, Hants: Gower, 1992.

Cita MLA (9th ed.)

Gillen, Terry. Assertiveness for Managers. Gower, 1992.