Amazon.com: Bulgarian For Beginners (Cornell Workbook): An Adaptable Notebook To Practice Learning Bulgarian Phrases, Grammar, Alphabet and Translations (9781719837170): Official, StudyGo: Books
Amazon.com: Colluquial Bulgarian: The Complete Course for Beginners (Colloquial Series) (9780415316224): Kjetil Ra Hauge, Yovka Tisheva: Books