In a word, Research
What is:
** 30 seconds **
** 30 ** seconds
** 30 ** seconds
What is author(s)?
Only the first author is listed when there are more than 3 authors, and the first name should be included.
The correct citation is:
Downs, Jason P., et al. "The cranial endoskeleton of Tiktaalik roseae." Nature 455.7215 (2008): 925-929. Research Library, ProQuest. Web. 27 Aug. 2010.
** 30 ** seconds