APA

Dekov R., Venkov V., Деков Р. & Венков В. (1977). Getting to know Bulgaria?. Sofia: Sofia Press.

Chicago

Dekov Roman, Venkov Venceslav, Деков Роман and Венков Венцеслав. 1977. Getting to know Bulgaria?. Sofia: Sofia Press.

Harvard

Dekov R., Venkov V., Деков Р. and Венков В. (1977). Getting to know Bulgaria?. Sofia: Sofia Press.

MLA

Dekov Roman, Venkov Venceslav, Деков Роман and Венков Венцеслав. Getting to know Bulgaria?. Sofia: Sofia Press. 1977.