Nelson, R. (2009). The greatest sales training in the world. Jaico Publishing House.
Citazione stile Chigago Style (17a edizione)Nelson, Robert. The Greatest Sales Training in the World. Ahmedabad: Jaico Publishing House, 2009.
Citatione MLA (9a ed.)Nelson, Robert. The Greatest Sales Training in the World. Jaico Publishing House, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.