L'Engle, M. (1980). A ring of endless light. Bantam Doubleday Dell.
芝加哥风格引文L'Engle, Madeleine. A Ring of Endless Light. New York,NY: Bantam Doubleday Dell, 1980.
MLA引文L'Engle, Madeleine. A Ring of Endless Light. Bantam Doubleday Dell, 1980.
警告：这些引文格式不一定是100％准确.