Hopson, B., & Scally, M. (1994). Twelve steps to success through service. Excel.
Chicago Edition CitationHopson, Barrie, i Mike Scally. Twelve Steps to Success Through Service. New Delhi: Excel, 1994.
Cita MLAHopson, Barrie, i Mike Scally. Twelve Steps to Success Through Service. Excel, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.