<a href="https://en.wikipedia.org/wiki/Auditorium_Building,_Chicago" class="extiw" title="en:Auditorium Building, Chicago">Auditorium Building, Chicago</a>. Elevation.
Kasprzyk, Mark, delineator. <a href="https://en.wikipedia.org/wiki/Library_of_Congress" class="extiw" title="wikipedia:Library of Congress">Library of Congress</a>, <a href="https://en.wikipedia.org/wiki/Historic_American_Buildings_Survey" class="extiw" title="en:Historic American Buildings Survey">Historic American Buildings Survey</a> / <a href="https://en.wikipedia.org/wiki/Historic_American_Engineering_Record" class="extiw" title="en:Historic American Engineering Record">Historic American Engineering Record</a>
1963
Retrieved from HABS/HAER website <a rel="nofollow" class="external autonumber" href="http://lcweb2.loc.gov/pp/hhquery.html">[1]</a> specifically <a rel="nofollow" class="external autonumber" href="http://memory.loc.gov/cgi-bin/ampage?collId=pphhphoto&amp;fileName=il/il0000/il0091/photos/browse.db&amp;action=browse&amp;recNum=0&amp;title2=Auditorium%20Building,%20430%20South%20Michigan%20Avenue,%20Chicago,%20Cook%20County,%20IL&amp;displayType=1&amp;itemLink=D?hh:5:./temp/~pp_dQl8::">[2]</a> on 12 October, 2006