International Training Corporation. (1993). Effective presentation skills. Pfeiffer & Company.
Citazione stile Chigago Style (17a edizione)International Training Corporation. Effective Presentation Skills. Amsterdam: Pfeiffer & Company, 1993.
Citatione MLA (9a ed.)International Training Corporation. Effective Presentation Skills. Pfeiffer & Company, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.