APA

Петков Г., . (1986). The international activity of the Fatherland Front. : Sofia-Press.

Chicago

Петков Георги, . 1986. The international activity of the Fatherland Front. : Sofia-Press.

Harvard

Петков Г., . (1986). The international activity of the Fatherland Front. : Sofia-Press.

MLA

Петков Георги, . The international activity of the Fatherland Front. : Sofia-Press. 1986.