Fig. 30A: Illustration of a Eukaryotic Cell
Blausen.com staff (2014). "Medical gallery of Blausen Medical 2014". WikiJournal of Medicine 1 (2). DOI:10.15347/wjm/2014.010. ISSN 2002-4436.
[CC BY 3.0 (https://creativecommons.org/licenses/by/3.0)], from Wikimedia Commons.