Author: Libb Thims
Self-made diagram (using MS Word) based on Steinberg's triangular theory of love
<a href="https://en.wikipedia.org/wiki/User:Sadi_Carnot" class="extiw" title="wikipedia:User:Sadi Carnot">Sadi Carnot</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
8 March 2006 (original upload date)
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons. Transfer was stated to be made by <a href="//commons.wikimedia.org/wiki/User:Waldir" class="mw-redirect" title="User:Waldir">User:Waldir</a>.