APA aipamena

Hyam, M. (1990). Advocacy skills. Blackstone Press.

Chicago Style aipamena

Hyam, Michael. Advocacy Skills. London: Blackstone Press, 1990.

MLA aipamena

Hyam, Michael. Advocacy Skills. Blackstone Press, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.