Rantai keberadaan: Perbedaan antara revisi

<ref name=Lovejoy1964>{{citation |date=1964. First published 1936 |author=Arthur O. Lovejoy |authorlink=Arthur Oncken Lovejoy |title=The Great Chain of Being: A Study of the History of an Idea |url=http://books.google.com.au/books?id=5u3HZjTpkTgC&dq=Lovejoy+%22The+Great+Chain+of+Being%22&printsec=frontcover#v=onepage&q&f=false |place=Cambridge, Massachusetts |publisher=Harvard University Press |isbn=0-674-36153-9}}</ref>}}