APA

Crampton R. J., . (2005). A concise history of Bulgaria. Cambridge: Cambridge University Press.

Chicago

Crampton R J, . 2005. A concise history of Bulgaria. Cambridge: Cambridge University Press.

Harvard

Crampton R. J., . (2005). A concise history of Bulgaria. Cambridge: Cambridge University Press.

MLA

Crampton R J, . A concise history of Bulgaria. Cambridge: Cambridge University Press. 2005.