Bittle L.R. (1990). What Every Superisor Should Know. TMH.
Chicago Style aipamenaBittle L.R. What Every Superisor Should Know. New Delhi: TMH, 1990.
MLA aipamenaBittle L.R. What Every Superisor Should Know. TMH, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.