APA aipamena

BARKER ALAN. (2010). SUNDAY TIMES IMPROVE YOUR COMMUNICATION SKILLS (2ND.). KOGAN PAGE.

Chicago Style aipamena

BARKER ALAN. SUNDAY TIMES IMPROVE YOUR COMMUNICATION SKILLS. 2ND. LONDON: KOGAN PAGE, 2010.

MLA aipamena

BARKER ALAN. SUNDAY TIMES IMPROVE YOUR COMMUNICATION SKILLS. 2ND. KOGAN PAGE, 2010.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.