Maas, W. (2013). Democratic citizenship and the free movement of people. Martinus Nijhoff Publishers.
芝加哥风格引文Maas, Willem. Democratic Citizenship and the Free Movement of People. Leiden [Netherlands]: Martinus Nijhoff Publishers, 2013.
MLA引文Maas, Willem. Democratic Citizenship and the Free Movement of People. Martinus Nijhoff Publishers, 2013.
警告：这些引文格式不一定是100％准确.