Bregstein, B. (2016). Complete Spanish step-by-step: The fastest way to achieve Spanish mastery. McGraw-Hill Education.
Citazione stile Chigago Style (17a edizione)Bregstein, Barbara. Complete Spanish Step-by-step: The Fastest Way to Achieve Spanish Mastery. New York: McGraw-Hill Education, 2016.
Citatione MLA (9a ed.)Bregstein, Barbara. Complete Spanish Step-by-step: The Fastest Way to Achieve Spanish Mastery. McGraw-Hill Education, 2016.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.