Kay, L., & Palen, S. (2006). 21st century astronomy. New York: Norton & Company.
Trích dẫn kiểu ChicagoKay, Laura, và Stacy Palen. 21st Century Astronomy. New York: Norton & Company, 2006.
MLA引文Kay, Laura, và Stacy Palen. 21st Century Astronomy. New York: Norton & Company, 2006.
警告：这些引文格式不一定是100％准确.