Barnabas, B. (1984). Develop your power to deal with people. Parker Publishing.
Chicago-referens (17:e uppl.)Barnabas, Bentley. Develop Your Power to Deal with People. India: Parker Publishing, 1984.
MLA-referens (8:e uppl.)Barnabas, Bentley. Develop Your Power to Deal with People. Parker Publishing, 1984.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.