RUSSELL TIM. (1994). EFFECTIVE FEEDBACK SKILLS. KOGAN PAGE.
Chicago Style aipamenaRUSSELL TIM. EFFECTIVE FEEDBACK SKILLS. LONDON: KOGAN PAGE, 1994.
MLA aipamenaRUSSELL TIM. EFFECTIVE FEEDBACK SKILLS. KOGAN PAGE, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.