MacDonald, G. R. (1929). Lessons in Spanish Commercial Correspondence. Sir Isaac Pitman and Sons, Ltd.
Citazione stile Chigago Style (17a edizione)MacDonald, George Robert. Lessons in Spanish Commercial Correspondence. Londres: Sir Isaac Pitman and Sons, Ltd, 1929.
Citatione MLA (9a ed.)MacDonald, George Robert. Lessons in Spanish Commercial Correspondence. Sir Isaac Pitman and Sons, Ltd, 1929.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.