Chang, R. (1998). Imprpving through bench marking. Wheeler.
Chicago Style aipamenaChang, Richard. Imprpving Through Bench Marking. New Delhi: Wheeler, 1998.
MLA aipamenaChang, Richard. Imprpving Through Bench Marking. Wheeler, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.