APA

(1999). Republic of Bulgaria Laws for Education. : St. Kliment Ohridski Univ.Press.

Chicago

1999. Republic of Bulgaria Laws for Education. : St. Kliment Ohridski Univ.Press.

Harvard

(1999). Republic of Bulgaria Laws for Education. : St. Kliment Ohridski Univ.Press.

MLA

Republic of Bulgaria Laws for Education. : St. Kliment Ohridski Univ.Press. 1999.