Andres, T. D. (1995). The effective manager. New Day.
Cita Chicago (17th ed.)Andres, Tomas D. The Effective Manager. Quezon City: New Day, 1995.
Cita MLA (9th ed.)Andres, Tomas D. The Effective Manager. New Day, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.