Barnabas, B. (1984). Develop your power to deal with people. Parker Publishing.
Cita Chicago (17th ed.)Barnabas, Bentley. Develop Your Power to Deal with People. India: Parker Publishing, 1984.
Cita MLA (8th ed.)Barnabas, Bentley. Develop Your Power to Deal with People. Parker Publishing, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.