Powell, H. J. (2005). Higher Law. In The Oxford Companion to the Supreme Court of the United States. Oxford University Press.

Powell, H Jefferson. “Higher Law.” In The Oxford Companion to the Supreme Court of the United States. Oxford University Press, 2005.

Powell HJ. Higher Law. In: The Oxford Companion to the Supreme Court of the United States. Oxford University Press; 2005.

Powell, H. Jefferson. “Higher Law.” The Oxford Companion to the Supreme Court of the United States, Oxford University Press, 2005.

Powell HJ. Higher Law. The Oxford Companion to the Supreme Court of the United States. Oxford University Press; 2005.