http://www.librarything.com/author/haanmrde
http://www.swordofthelord.com/biographies/DeHaanMR.htm
http://socialarchive.iath.virginia.edu/ark:/99166/w6vb1s72
http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?action=display&authority_id=XX1152790
http://id.loc.gov/authorities/names/n79054923
http://katalog.nsk.hr/F/?func=direct&doc_number=000004923&local_base=nsk10
http://isni.org/isni/0000000073576677
http://www.rbc.org/devotionals/our_daily_bread/writer/4555.aspx
http://www.wholesomewords.org/biography/biorpdehaan.html
https://aleph.nkp.cz/F/?func=find-c&local_base=aut&ccl_term=ica=uk2012677195&CON_LNG=ENG
https://d-nb.info/gnd/120981912