APA aipamena

FRANCIS, D. (1991). Effective Problem Solving Dave Francis. Routledge.

Chicago Style aipamena

FRANCIS, Dave. Effective Problem Solving Dave Francis. Routledge, 1991.

MLA aipamena

FRANCIS, Dave. Effective Problem Solving Dave Francis. Routledge, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.