(2004). Reviews of national policies for education: Bulgaria. OECD.
芝加哥风格引文Reviews of National Policies for Education: Bulgaria. Paris, France: OECD, 2004.
MLA引文Reviews of National Policies for Education: Bulgaria. OECD, 2004.
警告：这些引文格式不一定是100％准确.
APA引文