Sagan, C. (1980). Cosmos. Random House.
芝加哥风格引文Sagan, Carl. Cosmos. New York: Random House, 1980.
MLA引文Sagan, Carl. Cosmos. Random House, 1980.
警告:这些引文格式不一定是100%准确.
Sagan, C. (1980). Cosmos. Random House.
芝加哥风格引文Sagan, Carl. Cosmos. New York: Random House, 1980.
MLA引文Sagan, Carl. Cosmos. Random House, 1980.