APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.