Bregstein, B. (2016). Complete Spanish step-by-step: The fastest way to achieve Spanish mastery. McGraw-Hill Education.
Chicago-referens (17:e uppl.)Bregstein, Barbara. Complete Spanish Step-by-step: The Fastest Way to Achieve Spanish Mastery. New York: McGraw-Hill Education, 2016.
MLA-referens (9:e uppl.)Bregstein, Barbara. Complete Spanish Step-by-step: The Fastest Way to Achieve Spanish Mastery. McGraw-Hill Education, 2016.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.