APA

Zivkov T. H., . (1989). The Bulgarian people's unity - a concern and a destiny for every citizen. : Sofia Press.

Chicago

Zivkov Todor Hristov, . 1989. The Bulgarian people's unity - a concern and a destiny for every citizen. : Sofia Press.

Harvard

Zivkov T. H., . (1989). The Bulgarian people's unity - a concern and a destiny for every citizen. : Sofia Press.

MLA

Zivkov Todor Hristov, . The Bulgarian people's unity - a concern and a destiny for every citizen. : Sofia Press. 1989.