Oruka, H. O. (1991). The philosophy of liberty: An essay on political philosophy. Standard Textbooks.
芝加哥风格引文Oruka, H. Odera. The Philosophy of Liberty: An Essay on Political Philosophy. Nairobi: Standard Textbooks, 1991.
MLA引文Oruka, H. Odera. The Philosophy of Liberty: An Essay on Political Philosophy. Standard Textbooks, 1991.
警告：这些引文格式不一定是100％准确.