Knocking at Your Back Door (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Knocking at Your Back Door" in Spanish language version.

refsWebsite

Global rank Spanish rank

1books.google.com

3^rd place

7^th place

19^th place

33^rd place

billboard.com

«Billboard singles chart history-Deep Purple». Consultado el 21 de febrero de 2009.

books.google.com

Martin Popoff The Top 500 Heavy Metal Songs of All Time, p. 319, en Google Libros