APA

Black F. H., . (1934). The american college of Sofia. New York-US: The institute of international education.

Chicago

Black Floyd H, . 1934. The american college of Sofia. New York-US: The institute of international education.

Harvard

Black F. H., . (1934). The american college of Sofia. New York-US: The institute of international education.

MLA

Black Floyd H, . The american college of Sofia. New York-US: The institute of international education. 1934.