MLA

Chleborad, František Ladislav, 1839-. Bulgarische Grammatik. 1888.. https://collections.library.yale.edu/catalog/31936033.

APA, 6th edition

Chleborad, František Ladislav, 1839-. (1888.)[Bulgarische Grammatik]. https://collections.library.yale.edu/catalog/31936033.