APA

Янков Г., . (1989). Aspects of the development of the Bulgarian nation. : Sofia-Press.

Chicago

Янков Георги, . 1989. Aspects of the development of the Bulgarian nation. : Sofia-Press.

Harvard

Янков Г., . (1989). Aspects of the development of the Bulgarian nation. : Sofia-Press.

MLA

Янков Георги, . Aspects of the development of the Bulgarian nation. : Sofia-Press. 1989.