Bishop, S. (2010). Develop your assertiveness (2nd ed.). Kogan Page.
Chicago Style aipamenaBishop, Sue. Develop Your Assertiveness. 2nd ed. London: Kogan Page, 2010.
MLA aipamenaBishop, Sue. Develop Your Assertiveness. 2nd ed. Kogan Page, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.