(2010). 21st century astronomy. New York: W. W. Norton.
Trích dẫn kiểu Chicago21st Century Astronomy. New York: W. W. Norton, 2010.
MLA引文21st Century Astronomy. New York: W. W. Norton, 2010.
警告：這些引文格式不一定是100％准確.
APA引文
(2010). 21st century astronomy. New York: W. W. Norton.
Trích dẫn kiểu Chicago21st Century Astronomy. New York: W. W. Norton, 2010.
MLA引文21st Century Astronomy. New York: W. W. Norton, 2010.