Gillen, T. (1995). Positive influencing skills. Institute of Personnel and Development.
Citación estilo ChicagoGillen, Terry. Positive Influencing Skills. London: Institute of Personnel and Development, 1995.
Cita MLAGillen, Terry. Positive Influencing Skills. Institute of Personnel and Development, 1995.
Warning: These citations may not always be 100% accurate.