Barnabas, B. (1984). Develop your power to deal with people. Parker Publishing.
Chicago Style aipamenaBarnabas, Bentley. Develop Your Power to Deal with People. India: Parker Publishing, 1984.
MLA aipamenaBarnabas, Bentley. Develop Your Power to Deal with People. Parker Publishing, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.