Purdue Research Foundation & Purdue University. Department of Foreign Languages & Literatures. (1996). Global business languages. Purdue Research Foundation.
Citazione stile Chigago Style (17a edizione)Purdue Research Foundation e Purdue University. Department of Foreign Languages & Literatures. Global Business Languages. West Lafayette, IN: Purdue Research Foundation, 1996.
Citatione MLA (9a ed.)Purdue Research Foundation e Purdue University. Department of Foreign Languages & Literatures. Global Business Languages. Purdue Research Foundation, 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.