Sagan, C. (1985). Cosmos. New York: Ballantine Books.
Trích dẫn kiểu ChicagoSagan, Carl. Cosmos. New York: Ballantine Books, 1985.
MLA引文Sagan, Carl. Cosmos. New York: Ballantine Books, 1985.
警告：这些引文格式不一定是100％准确.
APA引文
Sagan, C. (1985). Cosmos. New York: Ballantine Books.
Trích dẫn kiểu ChicagoSagan, Carl. Cosmos. New York: Ballantine Books, 1985.
MLA引文Sagan, Carl. Cosmos. New York: Ballantine Books, 1985.