APA

Panayotov K., Lambrinov D., . (1989). New aspects of Bulgaria's ecological policy. : Sofia-Press.

Chicago

Panayotov Kiril, Lambrinov Dimitar, . 1989. New aspects of Bulgaria's ecological policy. : Sofia-Press.

Harvard

Panayotov K., Lambrinov D., . (1989). New aspects of Bulgaria's ecological policy. : Sofia-Press.

MLA

Panayotov Kiril, Lambrinov Dimitar, . New aspects of Bulgaria's ecological policy. : Sofia-Press. 1989.