ELLYARD, D. L. (2003). OUR AMAZING PLANET. TIME LIFE BOOKS.
芝加哥风格引文ELLYARD, DAVID/ LEVY. OUR AMAZING PLANET. TIME LIFE BOOKS, 2003.
MLA引文ELLYARD, DAVID/ LEVY. OUR AMAZING PLANET. TIME LIFE BOOKS, 2003.
警告：这些引文格式不一定是100％准确.
APA引文