APA引文

Hester, J. (2007). 21st Century Astronomy Stars and Galaxies. McGraw Hill Companies Inc.

Trích dẫn kiểu Chicago

Hester, Jeff. 21st Century Astronomy Stars and Galaxies. McGraw Hill Companies Inc, 2007.

MLA引文

Hester, Jeff. 21st Century Astronomy Stars and Galaxies. McGraw Hill Companies Inc, 2007.

警告：这些引文格式不一定是100％准确.