APA

(1959). Fifteen years of people's rule in Bulgaria. Sofia: Fremdspachen verlag.

Chicago

1959. Fifteen years of people's rule in Bulgaria. Sofia: Fremdspachen verlag.

Harvard

(1959). Fifteen years of people's rule in Bulgaria. Sofia: Fremdspachen verlag.

MLA

Fifteen years of people's rule in Bulgaria. Sofia: Fremdspachen verlag. 1959.