Gibbon, D., & Buckland, S. (1994). Survival 3. Student´s manual. Spanish edition. Wall Street Study Centre.
Citazione stile Chigago Style (17a edizione)Gibbon, David, e Simon Buckland. Survival 3. Student´s Manual. Spanish Edition. Wall Street Study Centre, 1994.
Citatione MLA (9a ed.)Gibbon, David, e Simon Buckland. Survival 3. Student´s Manual. Spanish Edition. Wall Street Study Centre, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.